That makes sense for art, and I'm personally a fan of some of the aesthetics in WoW (although it's definitely not 'awe-inspiring'), but it seems like most of the complaints about Blizzard's "design" are more just bad user experiences. Not to be too focused on the definition of art, and I see your point about companies outgrowing the more organic design choices (be it art, user experience, etc).
Thanks for clarifying your position.