What about Tiago, Andrade, Cassano, Juan, Cicinho, Pato, Giuly, Emerson, Jankovic, Miccoli, Costinha, Tavano, Grygera, Lavezzi, Salihamadzic etc arriving? not to forget the players player in B last season.
Overall, I think Serie A has strenghtened itself despite the loss of some players.