I'm not sure if I should approach answering this from the "Oh, another person who will never be satisfied" angle or the "Oh look, another person who has no idea how sweeping updates in software development work" angle.
Suffice to say: It's a big change. the actual styles are fine. Could they use better resolution? Yes, but then they'll have to update the entire game engine to accommodate that, do you mind if we just have them scrap the character model revamps and push them out to two expansions from now? Of course, no guarantee then either, as no one knows what the state of the game will be at that point.....
If you're looking for cutting edge graphics with hair-fine resolutions: You're playing the wrong game.