Not to pander to the skill sets that pro scouts are looking for. Contrary to what the Fox broadcast team blathering through the second half of the Sugar Bowl, college football does not exist to be a developmental league for the NFL. Besides, the NFL is a copycat league, and mortified of things against the status-quo. Take the wildcat for instance. When the Dolphins started using it, it was seen as a desperate gimmick by a crappy team. Now, tons of teams have worked it into their offenses. Same with the much-maligned "West Coast" systems back in the 80's. All I'm saying is, right now Tebow is seen as a "risk," and nothing makes an NFL GM's balls shrink like that word.
Besides, the Broncos are going to draft him and use him as an h-back, so all this is meaningless.