Honestly, I don't hold out a lot of hope for Stalzer playing much, either this year or in the future. I think the talent is improving quickly enough that he will struggle to find a niche in an already crowded rotation. That said, I'm not writing him off either. He has the best stroke on the team and, despite last year's numbers, I do think he has a chance to develop into the shooter we need.
In any case, I'm glad he's on the team. He and Tad seem to have an understanding that he'll get a chance to compete, but will never see big minutes. In the worst-case scenario, he doesn't develop into a regular contributor, but won't complain about his role and gives you a passable PG on a pinch as a 12th or 13th man. In the best case, he develops his shooting and ball handling to the point that he becomes a steadying influence on the team, stretches defenses, and gives 10-15 quality minutes per game. There's more value to that than people realize.
Having said all of that, the bottom line is I still don't see the upside in redshirting him. Pay for his degree, tip your cap and thank him for his contributions on 4 NCAA tournament teams!