I think it's hard to say with Rees. Because he was such a creature of BK, and inherited such a golden situation when he took over as OC, that it's still an open question how good or not he really is. And now he's going to an even goldener situation at Bama, where I don't think there's ever been an OC who has failed as such. So I'm not sure what that will tell us.
Having said that much I assume he will do fine, which is to say that I don't expect a drop-off with Bama, not so much because of TR's expert coaching acumen as such, but because Bama could win with a ham sandwich as OC. The point being it will be difficult to tell anything new about TR, because he will not have had to perform in anything much resembling a challenging situation for a young OC.....