I hope Lance stays on the sidelines. You just don't break up the chemistry these guys seem to have. I mean ok, let's wait for those final games to happen but either way, keep them in flow, every game is good for the group. I wouldn't even sit starters if the seed was carved in stone before the last game.
Maybe let Lance play a quarter in an already decided game, other than that, no. I would have given another QB a chance in the beginning of the season after the post season desaster of last year. But now that they have found their way together I wouldn't disrupt it.