I actually don't mind its WoW-likeness. WoW (or whatever MMO WoW copied from..some say Lineage2 but whatever) has pretty much set the standard interface in MMOs. Someone has to start it somewhere.

Maybe some people learned from Tabula Rasa that revolutionizing something may not be the best idea. I think what Aion is trying to do is get the best things out of MMOs that have been proven successful, add some new stuff of their own (ie wings) and integrate it in the game. We'll see how that pans out for them I guess.