Underwood has incredible throwing talent, can throw back against the grain better than anyone they have had since Henson. But Henson is exactly the question about Underwood - does he have it between the ears or not? Sadly Henson didn't, though the team could have done worse than get Tom Brady as the consolation prize.
Aside from his processing, Underhill needs to work on touch -he's rocketing too often on short throws where he needs to give his receivers half a chance. My interest in college football has been at an all-time low, but watching to see how Underhill develops is keeping me interested for now.