I was looking on Goblin models... The animations are just marvelous (same goes to textures)
I can't imagine Blizzard updating old models any time soon... :P just look at this goblin's facial expression...
Now take human model for instance... Would you like him to rise his eye brow? or close his eye when aiming at target? I mean cmon :P
It will take freakin amount of time (year or even longer) to make new models for old races (Not to mention the whole QQ from not satisfied players)
And it's kinda sad that NPC/MOB models are lookin way better than character models...
Vrykul? anyone?