Well, he is doing a bit better this season. IMO, the best thing to do would be to bring him back to Juve for next season. I think that he'll gain confidence if the club shows some in him.
Alright, so I've managed to get my hands on some tape of Muntari, and he's a pretty good player, but nothing special. Brighi easily surpasses him on an average day. What's more, both Appiah and Maresca are just as good if not better than him.