I don't think it's just Ohio State. And Wisconsin always has monster OL, problem is they only return 2 starters (who both happen to be top 25 OL). Problem is Bama's DL.
I don't know if Bama faced one guy last year, including Artis-Payne, who was as good as Clement will be this year, but their DL is tough regardless. The turning point will be QB. Even though Bama has big question marks there, Joel Stave is still around and I can't believe they win games with him there. Bama's new guy will probably be better than Stave right off the bat.