After Texas and Oklahoma announced their move from the Big 12, it appears the remaining 8 Big 12 teams are in discussions to go back up to 12 by adding football independent BYU and then 3 teams from the American - Cincinnati, Central Florida, and Houston. Nothing has been finalized, but it appears that is what they are looking at.
If they added those 4, they would likely end up with divisions that look like this
East - West Virginia, Central Florida, Cincinnati, Kansas, Kansas St., Iowa St.
West - Baylor, Texas Tech, TCU, Houston, Oklahoma St., BYU
Significantly weaker overall than the other 4 power conferences, but also a good deal better than the little 5.