If u watch just the lsu, that's a recipe for disaster for manziel. Much like Case, he can't see or find passing lanes when teams come up the middle. His instincts tell him to retreat backwards or move outside vs navigation inside the pocket. Not only that, he gets claustophobic when teams "sugar" rush him. When the rush stays discipline and keeps him in the pocket, he can't see. Not only that,he's played in a 1st read system. You never see his head move after the 1st read until he's outside the pocket.
I like jff a lot as a college player, I wouldn't touch the guy in the 1st or 2nd rd. The interview process for him will be critical in terms of his commitment to football. His chalkboard will be a 0 because of the joke offense and his improv he performed a lot. People will have him from 1st rd to undraftable.
Be a student of the game, not a fan.