I think he is the difference between making a Round 2 and Sweet 16/Elite Eight run if things fell right. With him in the lineup we are much more flexible in how we use Damian and the other forwards. He has a tenacity and physicality that is critical to winning Big Ten games that we lack in anyone else (with the possible exception of Royce if he develops that way).
Without him, my expectations are top 4 Big Ten, NCAA Round 2. With him, Top 2-3 Big Ten with a shot at winning it and at least NCAA Round 2 with a shot to go Sweet 16 if we get seeded well.
Either way I think we lack a reliable scorer unless someone steps up.