The 4 spot is a big question-mark in my mind. We need at least 2 combinations of players at PF:
1) When we go small -- someone who can create mismatches, stretch the defense, space the floor, but still rebound and defend effectively. Hopefully that's Larrier, but he's more of a 3. Same with Jackson.
2) When we go big -- someone who can bang down low, post up, and rebound against bulkier teams. Not sure a freshman will be the answer here and Diarra is an unknown.
I'm less concerned about the center spot. Remember, we won it all in 2011 and 2014 with combinations of Oriakhi/Okwandu and Nolan/Brimah at the 5. As long as someone emerges who can defend without fouling and grab boards, we'll be fine. Not sure that Enoch will be that guy, as much as I'd like it to be. He needs to get in better shape so that he can be quicker on his feet when defending. His instincts are there, though.