The absolute best move would be for the PAC and Big 12 to merge. It creates an immediate wall over the Western half of the country, gives PAC schools exposure into every time zone, and puts their product in front of collectively more engaged fan bases.
I have no idea how it would work, but for nostalgia, I think adding the 4 corners and Oregon/Washington could lead to 3 - 6 team divisions that would be fun. A division of Colorado, Texas Tech, Kansas, Kansas State, Iowa State, and Oklahoma State would make me want to get a bigfoot pizza from pizza hut to get a free Big 8 team hat or paper jacket.
West: Washington, Oregon, Arizona, Arizona State, Utah, BYU.
Central: Colorado, Texas Tech, Kansas, Kansas State, Iowa State, Oklahoma State.
East?/Schools that have never really fit in and if they don't like it they can leave: Baylor, Houston, TCU, UCF, Cincy, WVU.
2 division winners with best record in football conference champ game? 17, or HELL, 22 game conference basketball schedule???