College sports only happens once; if he's not going to the draft now, stay another year. Italy will be there next year; most guys (former BYU players) stop playing because they are tired of it over seas, not because they can't anymore. He's not burning any bridges for his professional career by coming back.
I also don't buy this "fact" that he can't progress next year; who knows that. If he progressed as much as he did this year while still being post mish, whats to say he can't/won't progress next year.