He looked very good at times for City, it was the players around him, last year Tevez/Aguero with lots of movement, or Aguero/Dzeko. This year when he's played its often him with Silva/Nasri on the wings, and it hasn't worked at all. From the highlights there is a hell of a lot of movement off Balotelli(and from him as well). Passing people in behind, 1-2's, for City they were lumping the ball up to him, he won more headers than he should have, and the likes of Silva weren't putting in any effort to get on the end of knock downs, weren't running beyond Balotelli or getting close to him.
He's playing now as he did last year, and as he did over Summer, the only difference was the out of form players around him in City's first half of the season. Mancini hung him out to dry, City looked up till a few weeks ago, FAR better playing Aguero and Tevez, but its not because Balotelli was crap, its because Mancini was playing to mobile, hard working players who worked together, Mancini was playing Balotelli as a lone striker frequently without any real support at all.