Don’t understand why Texas would want to join the SEC when they can’t even win the Big 12? The only way this works is if Alabama and Auburn switch to the East Division so it winds up:
SEC East: Alabama, Auburn, Florida, Georgia, Kentucky, South Carolina, Tennessee, Vanderbilt
SEC West: Arkansas, LSU, Missouri, Mississippi St., Oklahoma, Ole Miss, Texas, Texas A&M
Still a very daunting schedule when you add in a conference championship game and then an 8 or 16-team playoff.
It's already kinda weird, in football at least. I know that Kentucky plays SEC West member Miss. St. every year, but only plays Alabama every 7 years.
Your proposed alignment makes sense.