Rather than bore you with them, I'll just give the major one: 3D.
The game is now in 3D, and like all strategy games that went from 2D->3D, it suffers from "Can't see things that well" syndrome.
Now that everything is in 3D, I can't see the units that well. Is that a warrior? Spearman? Is that even a dude? Is he mine? Is he an enemy?
The hell should I know!
I don't understand why these games try to do 3D when it really serves no purpose to the actual game. It makes no sense. The only time you can ever figure out what the units are is when you zoom super-far into the map, and then you have such a small view of things that you end up missing shit anyways!
This is why Starcraft is 100x better than Warcraft 3; I couldn't see what was what in WC3; but I could in SC.
I want to know; is this just me, or does anyone else ever feel this way?