They will just be more cautious with the scholarships they have, and try to recruit kids who they think will have an immediate impact. O'Brien is a damn good coach, and they will have the talent to be good for most of the game. It's just the depth that will kill them in most of their games.
Zero depth is right. They have to hit on all of their recruits in order to contend, and that's just not possible. They'll get some good players, but there will be too many weak links (their defense will be very problematic)