It's a dead horse but why not:
Now you might very well be saying, "why is YOC posting that Shad video? Sure, Shadiversity knows a lot about swordfighting, but that video is still just 1+ hours of a nerd pointing out that it's a movie fight, not a real one." Well that's not entirely true; I maintain it's a bit more than that. The necessary contrast is provided with Shad's video on another fight scene in Star Wars:
Granted, these videos are mainly of interest to people who are into fight scene choreography. They go into far too much detail for a casual moviegoer, but they do show that there is a level of effort that needs be put into action choreography and it's completely absent from Rian's movie. Shad goes into things like telegraphing swings, maintaining guard position, leaving wide openings, and whether the fighting shows good technique. It's mildly interesting because lightsaber dueling is such a big element of Star Wars.
The throne room fight scene was obviously choreographed by a dance choreographer and not a fight choreographer— at several points the actors and stuntmen do totally nonsensical things "because it looks good"— the characters are essentially dancing with each other. Think Michael Jackson's "Beat It" video. And I think the general audience does get this impression; the fighting looks "for show." When fighting looks too much "for show," it loses the element of danger, and it doesn't have a climax. The Last Jedi clearly suffers from this problem— when the fight is over, the characters just look like they finished a workout video.
The Revenge of the Sith fight scene has other problems: it's far too long, has a couple of egregious moves that take you out of it, and ends on a rather silly note, with Obi-Wan picking up his dead friend's lightsaber and trotting off like he has some errands to run. Despite this, it still looks like a fight scene that serves a dramatic purpose. The Last Jedi scene is typical of the entire sequel trilogy in that it seems to have no point at all, other than these are big movies that need big action set pieces, and this is what they bothered to come up with.
This is really a larger problem with modern action movies— with few exceptions, Hollywood seems to have forgotten what makes an action scene enjoyable. It's not flashiness or dance moves, it's the climax to a dramatic build-up. Increasingly these movies don't competently build any sort of drama, so the fight scene is just a bunch of choreographed moves with no connection to anything. The audience is waiting for it to be over like bad sex, instead of being caught up in the experience.
This dramatic emptiness is more noticeable after you've seen an older movie get it right. But it's hard to gin up drama with flat characters who have uninteresting (or nonexistent *rolls eyes at Rey*) motivations that you're not invested in. I think it's even reflective of our own sense of cultural detachment and anomie.
When you look at popular YouTube lists of top movie fight scenes, they almost all favor flashy, videogamey action over dramatic catharsis, because it's hard to show the latter in a short YouTube clip. Instead you get clips that are "savage" and "brutal" and "grueling," i.e. frenetically-edited fake punches and stabs that impress vidya-addicted millennials whose productive effort consists of writing listicles for other childish millennials. Perhaps we get the fight scenes we deserve.
Another issue with that fight scene is the way so goddamn flatly presented. It's presented as a moving painting. I remember watching it in the cinema and I didn't notice any of the aforementioned choreography stuff until much later. My big issue on first viewing was that I didn't care about anything that was happening. Structural issues with the story aside, I could've still felt concern for this imperilled duo at least but... I wasn't watching two people being assaulted by a swarm of soldiers. I was watching a flow of color and movement.
For contrast, here's Jackie Chan, engaged in a weapon based fight against other armed guys:
Now, it's a Jackie Chan movie so he's hardly trying for realism. But Chan and his friend here always feel like they're actually in danger. Leaving aside the fact that they take the most direct way to attack him (no showy moves), you actually feel like he's outnumbered, as if he were being pummelled by waves of water, and trying to swim up and gasp for air. And because we're focused on him and his friend, we get to see them thinking things through, how they're gonna overcome this next problem.
In the throne room fight, we're pure spectators. We're never let "in" on what's happening. We are never given a moment to identify with Rey or Kylo. The most memorable part of that fight, for me— and I've only seen this movie once almost 3 years ago so I'm pulling this out of my head— is when one mook uses his electro-whip and is dragging Kylo in closer and closer, his saber is trapped, and he has to find some way out of the situation. We actually have a moment where the momentum slows down and the audience feels some worry for him, and watch how he makes his way through it.
But the rest of that fight? They're just going and going and going, and it's like the whole thing is a forgone conclusion. I remember checking out during that point in the movie, utterly bored by what was going on.
I'm the furthest thing from a choreographer, but here's my amateur advice: Rey is an inexperienced fighter, right? She should be swamped. The effect of all these guys attacking her with weapons she's never even seen before should be her constantly being back-footed. We should see her worried, afraid, throwing everything she has into her strikes, getting sloppy, making mistakes, falling back, with Kylo constantly having to rescue her, because he's been fighting with a lightsaber since childhood. You can still end the fight the same way, where he's now disarmed and backfooted and she chucks him her lightsaber and he kills the guy. But isn't it suddenly more rewarding now, seeing her rescue the far better swordsman after being at a disadvantage for the whole battle?
Rey's a scavenger, a street urchin facing down professional soldiers, and we watch her having to use her pluck and smarts to figure out some way to defeat them, since they're the far superior fighters. She thinks laterally, using her lightsaber in weird ways, thinking about creative, unorthodox ways you can use a lightsaber beyond swinging it like a sword. I mean, this is fucking classic cinema! There's so many fight scenes like this you can crib from where the underdog hero overcomes a far superior enemy using street smarts, pluck, and a little bit of trickery.
But of course, the problems with that fight scene extend beyond just it qua fight-scene. It's the stuff inherent in these characters. Rey has to be this perfect audience insert who is an instinctually fantastic fighter, because apparently that's what little girls want to see. The troglodytes behind the camera have no concept of human nature. They've totally forgotten how audiences like to see protagonists who are imperfect, imperilled, and overwhelmed, so it's that much more satisfying when we finally can watch them overcome the odds. They think that when people want to see a hero, what they want to see is someone who can do anything, who is always the best.
The scene lacks all dynamism, because it's all just a bunch of people fighting, all of whom are perfect fighters, and the winner is just the person who is 10% better. Which is, in a sense, more "realistic"because that's how a lot of IRL fights go: people are fairly well matched, but one guy is just a little bit better, or a little bit luckier. Each guard Rey and Kylo defeat, they don't defeat in some clever or emotionally engaging way. We never for one moment feel any sense of threat or accomplishment. They just do the right thing rather than the wrong thing.
The only remarkable moment in this fight is when Rey tosses Kylo the saber, deactivated, and he catches it, activates it into his enemy's head, and then deactivates it again. Shad's video mentions this too— it's in fact something useful and obvious you can do with a lightsaber that no one ever does. They should be doing this constantly. For example when the electro-whip weapon catches Rey's lightsaber, all she has to do is deactivate it for a second and he'll fall backward! This would be both logical and provide a moment of Jackie Chan-esque dynamism and creativity, showcasing Reys street-urchin cunning. Instead they do a lot of silly acrobatics and even punch enemies while ignoring their weapons.
The prequel films' choreography was obviously influenced by martial arts fighting— especially Hong Kong wire-fu stuff— and the saber wielders start doing more pointless flourishes in imitation of this, but the choreography is for the most part attempting to incorporate realistic moves. But by the time of the sequels the directors are all postmodern idiots who only know what fights are from watching movies with fights in them... which is much of the point of the criticism: the fights lose almost all of their verisimilitude and become glorified dance scenes.