I've watched Nance in warm ups and he can throw the ball a mile, so not sure arm strength is a problem with him because he can air it out then. Of course, that's just during warm ups, so take that as you will.....
Looking at him during games and how he is involved in the game, I think he may know the system as well as anyone on campus. Yet he's still seems to be learning more. From what I've seen and heard, he may play into the mix next year and give the other guys a run for their money on the job. In any case, he will be a good backup.