Oh hell to the NO!!!!
Look, I know we've been getting our faces kicked in more often than not since being in the BIG, but I would NEVER want to go back to the Big 12, doubly so since the only two "name" teams are gone.
We're never going to get back to even respectable if we go back to the Big 12, which, since UT and OU's departures, will become thought of as a Group 5 conference.
No, the only way through is forward. We stay in the BIG and keep working to get to Ohio State's level, not just accept being at Kansas' level.