Toughness has a lot to do with. Players -- especially the bigs -- are afraid of contact. Just look at this game (and PSU wasn't particularly big): fadaways, floaters, hooks, scoops. How many times do we go to the line? How many "and 1's" ?
Even O rebounding: we get so many because 1) we get so many opportunities, 2) Mike Williams (HE has toughness), 3)CJ and Doorson take up a lot of room. 4) Opps have had little size.
We do lack leadership, especially in this area.