Any way you look at it college is a step back for him. If he wants to be the big fish in the small pond then he should go back to his alma mater. If he's still got the fire and wants to compete for a world championship, which has escaped him to this point, then college will not put the fire out. I will never blame a man who does what is in the best interest of himself and his family. I just don't see it.
So you know Jim Harbaugh and what goes on in his mind?
Like I said somewhere else: Remember Nick Saban.