Germany have one way to end war quickly - let french rusch them,and then attack through Belgium and take Paris.It would work if they do not send part of their France to East Prussia.Forcing the UK to declare war on Germany without the Belgian pretext is a propaganda move aimed at America. If the US embargoes arms sales to all of the belligerents Britain and France have to pull a lot of men off the front to make guns they OTL bought from America. Russia is just stuffed. They don't have the infrastructure. The Belgians won't be on the lines or selling guns to the Entente either because they aren't protected from the consequences of breaking their neutrality by an ocean.
Combined with the Americans not coming to replace the Russians, Entente morale may collapse in 1918. With clever propaganda against the British blockade with physical materials like photographic plates smuggled to America by U-boat the Entente may feel under pressure to settle before America joins on the German side by that point.
If they only defend from french and attack Russia they would eventually break them,but not before 1916.Long war would hurt them more then Allies.
And,unfortunatelly,USA was arleady controlled by Wall Street,and those dudes wonted Germany down.Russia,too - but they would let german made their work there.
England would attack Germany to keep balance in Europe.
Best what Germany could achieve without Schielfen plan is draw,even with new technology.
There is one way to avoid war with England - become their puppet like prussia once was,or at least stop developing fleet.
But even then they would attack if Germany become too powerfull in their opinion,so i would not waste time on that.