I think there is a new player on the consideration board - one that did not exist when this thread started.
Reece Davis was on one of the local radio shows this past Summer and told whoever that the decision on where GameDay is the following week is not determined on the biggest game, but the best story. (Whatever that means.)
While the two games mentioned in this thread appear to be the only two that day with clear playoff implications, Rice at Houston might be the "better story". It will be the first college game scheduled to be played in Houston since Harvey paid the region a visit and both schools and teams were significantly impacted. If Irma comes ashore next weekend as forecast I would think that may ratchet the angle up a tad as well. The game is currently slated for ESPN3, but I am not sure that matters.