A&M supports the 9 game format. It's the only way they get the annual game back with UTx, and despite the 100 year decision talk, they want that game again.
I'm not that worried about UK. From what I've ready, they just want the hard P5 requirement dropped so they can dump Louisville if the SEC goes to 9. I think the SEC drops it or turns it into a suggestion like the B1G has, and they get UTn, UGA, or UF as one of their 3, they'll vote for 9.
South Carolina will not drop Clemson so they won't be as easy to win over.
Auburn and Bama both really prefer 9, imo. They both just want more say in who the 3rd program is going to be (after UTn and AU for Bama; and UGA and Bama for AU).
If I had to guess, I think Tennessee might be on the flip side of the coin. Both Vandy and Kentucky consider them their top in-conference rival. I bet they'd prefer to have both as permanent rivals. For them, 1-7 works if they think they get Bama, if they are told that Auburn gets Bama, they probably vote 9.