Mullin was a GM in the NBA; his strength is evaluating talent. Slice and Matt are two of the best recruiters in college ball; their strength is acquiring talent. If Mussini fills a role where he can help us win next year, he'll play. If not, he won't.
Personally, think that a guard who can hit FTs at 88% and ice a game has a role on a college team. We couldn't use him for that this year because we never had leads, but that should change next year.
If Mussini's playing time is reduced too drastically can't see him staying here much longer with pro money waiting on the table in Italy. My bet is that he works hard all off-season, carves out a role, and helps us win next year before he heads back home.