I just realized something that I thought I might share with you fine ladies and gentlemen that should fit in nicely with all the hate posts.
Japanese culture is pretty commonly followed in the West with Anime conventions, many, many anime television shows and movies produced with that cutesy-style art (specifically shows like Pokemon, etc), and a lot of other popular phenomena which originates from Japan. A lot of it is very childish by American and Western standards, in fact.
In Japan, it's quite different; "cutesy" is possibly the biggest seller there is in Japan, where in America, Violence reigns supreme. Why is it that both cultures willingly accept each other's "style" if you will, yet when Blizzard introduces something that's a bit "cartoony", despite the whole series of Warcraft (going back to Humans and Orcs) being in itself cartoony, it's met with hate and cynicism? I don't understand it.
Anyway, just a thought I felt like adding to the mix. I apologize for the broken English.
Edit: It seems people missing the point that I was trying to make; a simple comparison between the fact that "kiddy" or "childish" motifs are more accepted in Japanese culture than in western culture, despite World of Warcraft having a childish art style. It has been this art style since Humans and Orcs (WC1).
I'm just sharing a thought I had, is all. People are entitled to their opinion, whether they pay for the game or not.