How do you know that Pazzini would do well in a big club? Amauri was amazing for Palermo, even when he didn't score, he would work hard for the team and was a great target man. From time to time he'd score the odd wonder goal, and even did a few nice skills ala that famous no look pass to assist a Miccoli goal against Fiorentina.
He hasn't done well for Juventus, but Pazzini was just as bad if not worse for Fiorentina, you see to be forgetting that.