Granted, if UT/OK leave early, the B12 will get a heft exit fee. However, the media deal has a clause that it can terminate their deal, which will take up that fee plus cost more in media revenue going forward when it is renegotiated.
I don't see where the B12 is in any position to dictate anything.
If I'm the AAC commish, I'm working out "what-if" scenarios with ESPN, etc. on packages with a combined league with teams from the B12 that would give those teams more long-term value than languishing in the remnants of the B12.