Alabama's best argument isn't at the expense of TCU, but of OSU. Alabama hasn't had a chance vs UGA, UM, or TCU. OSU has. You can obviously argue that Bama didn't earn that chance (failed to win the SEC West), but in terms of rematch avoidance, they should make that a big deal.
Honestly though, if TCU stays 3rd, then what is the point in even playing the games anymore?? Just buy a game like Whoa Nellie and play out the season that way. No torn knees or concussion protocals, just dice rolls and bitchin'.