Dunno if you played early way back when before CTRaid and threat meters, first attempts in Molten Core... Still have fond memories of those times, running like 10 stopwatches, raid leaders barking over vent to tanks for stance dancing and people to get ready for the multitude of crap that was about to befall them, hunters being the only "safe" dps class because of feign death. Not necessarily keen on repeating that bit of history though =), especially considering encounters have only since become more complex.
All that aside, the turning speed for casters is another problem. Rogue hits sprint and runs circles around you, "you must face your target", you will never get a spell off.
Also, ingame communication? There is mic support, but the last thing you want is people mic spamming in general chat.
Really, any MMO coming out for consoles/controllers has to be specifically built from the ground up with that platform in mind. I don't doubt it can work, but the combat, zones, progression, communication, grouping and pvp HAS to be vastly different for that platform.
Bias aside (love/hate for consoles/WoW), simply copy pasting WoW onto the 360/PS3 without bundling a kb and mouse is going to end in a very bad experience for the users, I don't have to tell Blizz this though, I'm pretty sure they can tell when an idea is viable or not.


