When Saban left MSU for LSU, he applied the same roster management that he does at Bama and the SEC has always let him get away with it. He pulls offers from recruits when a better one comes along, he stashes borderline recruits in junior colleges or lesser universities, he runs off players who he made a mistake on recruiting by either suggesting they won't play or by giving them a medical scholarship if Bama is more important to them then football, he back-fills with transfers, JUCOs, the stashed recruits, etc.He has no weak links. The reason he was so made with Barnett when he transferred was the QB position is the one spot where it is not easy to do the above.
Go through our roster and throw out everyone who is not at least 2nd on the depth chart and has been on the team 2 years. Fill it like Saban does and see what we would have as a result.