The updated player models they showed look really good. Hopefully they'll make male humans look better in the update too.
I'm kind of surprised they raised the level cap to 100 instead of 95.
And no new class or race announced. I guess they did gave us a new race and
class in Mists of Pandaria, but I think we could get something new. Maybe they'll announce it later, like the new alliance race in the Burning Crusade expansion.
The new garrison sounds really cool.
If this is a time travel expansion, I wonder how it will affect the world of Azeroth.