Most MMORPGs aren't because if they were necessarily "special" then it wouldn't attract a big enough audience to make it "massive." Can be innovative, but yah. Plus, don't fix what ain't broke, I suppose.
But to be perfectly honest, I'm just talking out of my ass because I've never played Guild Wars, and I don't have any idea what GW2 is going to be like, but I'm just speculating, I guess.