You guys are exaggerating. Diego is a good player.
Yes he "failed" here but that was not necessarily his fault, since he was playing with horrible footballers(Grygera, Amauri, Iaquinta, Grosso, etc.).
Yes, this year he flopped at Wolfsburg and misbehaved but that probably has something to do with his failure here. When he got here, he was hailed as our new gem and as the player who was going to win the scudetto for us and he left bitterly the summer after. This undoubtedly had an impact on him.
I was against his arrival from the beginning since he was always going to chance our formation. We had played 4-4-2 for several years and we had not the tools and an experienced coach to adapt. We needed a regista and we got a DM(Melo), we needed a winger(to replace Camo/Nedved) and we got a trequartista, we needed solid fullbacks and signed Grosso, etc.
You guys are too harsh. Diego was a great player in Germany before coming here but lots of things did not go well here.
I'd argue that Krasic was not better for us than Diego. Both are good players but they can't constantly perform well when they are surrounded by shit.
I'd have kept Diego, Trezeguet, Caceres and Giovinco this season. However, Marotta did not think like that.
Buffon/Storari
Caceres-Bonucci-Chiellini-De Ceglie
Melo-Aquilani
Krasic-Diego-Giovinco
Trezeguet
That would have certainly done better.
My 2 cents.