i just can't see any GM (aside from JAX which has nothing to lose and will probably be leaving town anyway) risking it all one one guy - a slow QB who can scramble.
If tebow plays full-time for 1 year, he will be dinged up beyond belief. If he plays 3, he's injured and out of the league.
If he gets injured, the team has to completely change up the system for the new guy.
Finally, imagine the LOWlights each week, as we see Tebow miss 3 or 5 wide open passes every week. Embarassing for team, frustrating to wide recievers that he continually hangs out to get smashed. There are punters with more throwing accuracy than Tebow. I like the winning, underdog thing... but if I'm an owner, the negatives are just too high. force him to throw and it's Pick City, every week.