The only way Tua wasn't coming back was if he was a lock to go #1 and Bama won the Natty.
He and his family get taken care of way too well by the boosters there for him to leave otherwise. Wouldn't be surprised if he'll clear several million next season at Bama, in addition to everything else his family gets. He's that important to the program.
Meanwhile, we have guys like Bandy who don't even want to leave but feel like that have to because of how tough things are financially. That's the reality of college football now, and even with a non-incompetent coach/admin we'd still be on the short end of the stick of it