I cannot blame the current squad at all, a good coach makes the best out of each player, and Ferrara failed to make anything out of the brazilians so far except for Roma's game
Look at Prandelli and Gasperini, they achieve much with a much weaker squad than us, it's a matter of experience
Palladino, Nocerino, Almiron, Poulsen... add any names you like, they're all the same and none of them has the "winning" mentality
From all our current players I'd pick Buffon, Chiellini, Caceres, Marchisio, Gio, Diego and Criscito for the future, and buy a whole new team like Perez did
as for the rest some MUST be sold and some can make good subs, and a few as DP, Camo and David gotta stay to keep the team's spirit, but not to depend on them