Several things:
teehee Thrall no balls
Secondly, loading screens. The art works seem drastically different. Sylvanas and Wrynn look a lot different (and worse) compared to Thrall, Vol'Jin, and Baine. Vol'Jin, Baine, and Thrall look pretty good compared to Velen and Tyrande who look rather haphazardly photoshopped in an attempt to match the style. The nice artwork within most of the Kalimdor leaders is way too contrast to the comic book stylizing of Eastern Kingdoms. Just as well, the artistry of the comic books doesn't really mesh well with the usual loading screen art. Additionally, I think it would be better if Greymane was shown in Worgen form. Gallywix looks great, now they just need to do that for his in-game model.
Thirdly, the Arakkoa look good, though their polygons seem to be... less than what WoD is featuring. But overall very good. I especially like the gold chains they have connecting their beaks to their ears. Gives off a very exotic feel for the race.
Fourthly, the mage and monk season armors look good. The mage is very basic and not very... flashy, which is something that has begun to plague a lot of armors for this game. It is certainly similar in a lot of aspects to the early MoP season mage armor, but it's still a different armor, simpler and more polished.
Fifthly, there's still a lack of highly noticeable femgoat facial features. Notice how I said still? When you take away eye color, it reduces a lot of personality that a face can have, and with the femgoats it's fairly obvious even with their current in-game models. They severely need stronger defining features than changes of lipstick and arching of eyebrows. They need wrinkles, dimples, gems, additional spikes, more vibrant lip colors, just something that makes the faces more pronounced and unique.
Forsaken chicks look fine, though there still seems to be a lack of the "skull face" that I rather liked when I still played one. Nevertheless they look very pretty, scary, and cool.
As for all the other tedious number and item stuff, I'll let people with more of an attention span and stronger opinion have a whack at those.