No he didn't, used to stay on his feet. It must be the rise to the Prem that influences players to do such things.
I'm not sure he did dive much, sometimes some games a player will go down easily, sometimes not, hard to say from a few games. Harder to see on streams if tackles were bad, good, or a player just dived, they looked like he went down with little to no contact, but no replays on streams of those tackles, hard to be sure.
People seem to forget that lots o fmanagers get heavily involved, it was easy as anything to see how much the entire England team started diving the second Sven took over, I have no doubt it was simply one of Sven's tactics. Its more than possible Mancini has told him to go down as often as possible, who knows.
Mancini though, City were in fantastic form before he took over, he won the first 3-4 games against really the worst teams in the league, off the back of some good wins right before Hughes got fired, he's drawn and lost games that they wouldn't have lost had Hughes stayed.
Hughes did play an overly defensive midfield 3 a little himself, but more due to injury than anything else, Ireland collapsed and he changed the midfield around due to that, Mancini seems to want it that way. Likewise, the MASSIVE improvement of Tevez was clearly completely down to Hughes. Mostly its clearly a managerial difference again, Fergie tell Tevez to be a midfield terrier, and Hughes saying, get ball and run at the goal, leave the midfield to do midfield work.
Tevez is far more attacking in the box way way more often than he was at Utd, and well, hence the goals.
Though everyones scoring more this year, even the bottom 3, let alone the top 3. Rooney's scoring more, but so is Zamora, whose a decent enough player but its more the quality of the league thats changed than Zamora improving that much, same for Rooney really, his goals against, was it Wigan, were just gifted to him.