I don't know if you guys know much about Peyton Manning, but he's a master at detecting where the pressure is coming from, checking out of plays to avoid the blitz, avoiding pressure in the pocket, and quickly releasing the ball. He had a bad o-line in Indy the last few years he was there and still led them to the playoffs every year. He would be fine in Jacksonville. Now obviously they wouldn't be nearly as good as Denver is right now, but they would be a lot better than they are now.
And when Tebow led the Broncos to 8 wins, they had a much better defense than they do now. He was also just as bad as Gabbert, but somehow led them to miraculous 4th quarter wins, which Gabbert hasn't done.