He may have been a god in TNA for all I know (although no-one has ever been prepared to recommend me a match to watch from those days to substantiate the gulf in 'quality'), but as far as WWE goes...
His matches are horrible, the gimmick (as thin as it is - We're hardly talking Taker-like here) is crap and don't get me started on the shite rapping.
In terms of overness, IMO he's simply benefitting from the crowd's desire to feel a little more involved in the product (re: "Whassup?". Also see "Suck it" and tonnes of the guys back in Attitude days)... Dunno exactly how the pecking order of who get's to do what works, but all I can say is if it's down to him then fair play, he's smart. If not why the fuck are they only giving him (of all people) the option to play the crowd like that...?