Diallo isn't good enough to play meaningful minutes in the rotation. He can't hit the Free Throws which is a must in college hoops. As far as I see it, he would be used if our big men are in foul trouble and maybe he can develop his skills around the basket, Offensive rebounds, Defensive rebounds and possibly learn the post game???
We had nobody else last year except another Center who also could not hit Free Throws so he played. I hope he eventually can help this team in some way but I wouldn't expect to see a lot of him unless it's an absolute necessity.