It would be a really feel-good story, and one Buckeye fans would love, if Todd would turn out to be a great QB. I just don't think it's in the cards.
The staff decided, reluctantly I'm sure, that RS wasn't going to make a BT QB. I would guess that was due to ATHLETIC ability. If RS just needed to learn the cognitive aspects, I think the coaches would have stuck with him.
It appears to me that Todd is close to his ceiling wrt athletic ability, and that ceiling is too low.
I say that because I see Todd continue to throw late and underthrow routes late in the season. He has had years of excellent instruction and tons of practice and yet still doesn't put the ball in the right spot. Even when his protection is good. The pass to Small in the NC game was a perfect illustration. If he led Small in stride, it was a td. Instead, it was behind and was picked. (That play was similar to the td Troy threw to TGII in the Texas game.) His accuracy on shorter passes is also often poor.
That says to me that his coordination is not good enough.
On the other hand, I've seen Henton throw lasers right on the money,to a crossing receiver, while he is on the run himself. A guy that can do that has lots of coordination. Now AH probably doesn't know the playbook as well as Todd, but I would guess he knows it well enough by now.
So, unless something changes from what I've seen so far, I would expect Antonio to be the starter next fall.