No need to worry about that - Milligan will never play 25 minutes a game at the point. Milligan is lucky if he can pass the ball successfully around the perimeter without pressure, never mind being the primary ball handler and distributor.
It was stupid and irresponsible that Stallings did not bring in another point for this season, particularly with all the scholarships available. He should have learned the importance of point guard play last season if he was not already aware of it. M.Carr has a heavy burden to shoulder. Anything he is unable to carry will have to be carried by Stewart unless Davis is better than advertised. Andy Kennedy, Stallings and Athlon magazine all indicated that Stewart is looked at as a viable option at the point.
There is not much concerning playing time about next season that you can be certain of, but I feel safe predicting Milligan will not play anything close to 25 minutes at the point.