Love BW. Like stnd01 said, the 2 most important things are going somewhere that he will be unquestioned QB1, and he gets there for spring ball.
I think thirdly, it's important that he goes somewhere with a system that fits. Needs to be run heavy, and not reliant on the short throws. NFL is not going to happen IMO for him at QB unless he all of sudden learns short and intermediately accuracy and timing. IMO he needs to stick with what he does well, and find a system and depth chart that fits.
OSU IMO is a horrible match. Assuming he's made his mind up to leave, I hope BK, Chip, and Reesus are giving him honest/blunt advice, and going all out to help him pick a good match. GT would be an interesting spot. New coach, changing systems, no QB1. He could absolutely be a gateway QB, and would be awesome helping them transition.
My heart though wishes he would stay and switch positions. He's not a NFL QB, but he has NFL baller heart. If BK wasn't just coachspeaking, he might have the talent to do other things.