I'm not exactly opposed to this idea, but I think bringing Tim Tebow to our team could be potentially distracting and bring a lot of unwanted attention from the media.
By all accounts, Tebow seems like an upstanding guy with good character, that would probably mesh with our locker room pretty well. However, he's also publicly stated that he's not looking to be a backup or change positions. He wants to be a QB, and a starting one at that. Similar to Flynn, being stuck behind Wilson would get in the way of his aspirations, and he would want to leave Seattle when he gets the chance.
And although Tim Tebow is more athletic than Flynn and fits more into Russell Wilson's mold, he's not nearly as polished of a passer. If Wilson went down to injury, Flynn could probably still keep our season alive. If Tim Tebow were the backup, I think our season would be screwed. He's more of a developmental project.