i think everyone would be much happier if Diablo ripped off something like Warhammer, which in my opinion looks like garbage. The game looks fine the way it is, and thats taking into consideration the fact its still under development. People should spend less time criticizing the game and just be glad they decided to make a Diablo 3 at all. Come release day you will all buy it and love it. So theres really nothing to argue about.
If you want the game to be all about the graphics thats fine, but im more concerned about content and playability. And from the 1% of the game we have all seen so far it looks to me that they are doing a damn good job.