He is good but he is also far away from that. It'd be very very stupid bring him here when we already have Chiello and Bonucci (plus Barzagli and Sorensen as backups) and our team needs hardly to get stronged in so many other positions.
Oh, I hope we don't start Sorensen as a RB next season. I'm not saying he is bad, but he can definitely improve. We should get someone like Beck (or better) and allow Sorensen to learn from him, and grow as a defender.