I haven't read all of the posts in this very long thread, but here is my take.
If A&M left, why not keep the 9 remaining teams together and call it good? I'm sure there is no way they would keep the conference at 9 teams over the long haul, but why not?
If we lose A&M we aren't losing any TV sets because of the other Texas schools. We could still do a round robin schedule in football but we would have four non-conference games again. And in basketball we could still play every team twice and keep the conference schedule at 16 games, which opens up another couple games to play whoever we want.
I understand a 9 team conference would probably never happen, but I'm not thinking of too many negatives at this point...........which I'm sure you will all help me with.