Which is it, "1. The Confederacy could never have won," or "4. Once the EP was accepted in Europe, and once the US pincher movement was completed on the Mississippi River, the US had won [IOW, mid-1863]?"
The surest sign that you're mistaken is the fact that virtually no contemporary Unionist would have agreed with your timing. A year after your point of inevitable victory, virtually every Republican (if not absolutely all of them) either felt the result was far from guaranteed, or believed they were about to lose an election which, in the balance, held the fate of the war itself. This included Lincoln:
Executive Mansion
Washington, Aug. 23, 1864.
This morning, as for some days past, it seems exceedingly probable that this Administration will not be re-elected. Then it will be my duty to so co-operate with the President elect, as to save the Union between the election and the inauguration; as he will have secured his election on such ground that he can not possibly save it afterwards.
LINCOLN
Clearly the armchair presidents here are relying on hindsight to predict the end of the war. Is there any historian that agrees with this idea that the war was essentially done after the EP/Vicksburg? I know there are many who believe things were far from certain in August 1864.
"Lincoln expected George B. McClellan to be the next president. McClellan was the most popular Democrat and the most powerful symbol of opposition to Lincoln's war policies. . . . McClellan himself reportedly told a St. Louis businessman on August 24: 'If I am elected, I will recommend an immediate armistice and a call for a convention of all the states and insist upon exhausting all and every means to secure peace without further bloodshed.' " And regarding the Democratic platform peace plank drafted by Lincoln's old friend Vallandigham, "This crucial resolution made peace the first priority and Union a distant second." -- James McPherson, Battle Cry of Freedom, pp. 771-72.