I mean, the knock on Carey wasn't that he didn't have potential. People here labeled him as a bust just because Wanny had some sort of problem with throwing a rookie in as a starter (regardless of talent).
The knock on Carey was that he didn't hustle 100% of the time and took plays off. That's easy to do when you have a Wanny/Herm Edwards as a coach. It's not so easy to do under Nick.
He reminds me a little of Wright, in that he always had the potential, but needed a fire under his somewhat mammoth *** to motivate him to be his best. He's a LOT farther along than Wright in this process, however. They aren't Roth/JT/ZT kind of guys who just go out and hustle on every play. As long as Saban is coaching both of these guys and they BELIEVE in his system, they'll excel because they have tremendous natural talent.
These are both players who will excel in this system but (lucky for us) wouldn't do as well elsewhere.