Yeah, my definition of WoW-style is pretty broad I guess, so they'd have to do some rather massive changes in that case. Something along lines you are suggesting (ultimate sandbox) would probably be enough to make it unique.
---------- Post added 2012-12-03 at 08:02 PM ----------
Sadly, it's the suits (whom have no clue about gaming) that decide whether a game gets published or not. That's a recipe for disaster (unless you happen to like WoW-clones).