So there is a lot of smoke about SMU to the Big 12. \
https://espn.go.com/dallas/ncf/story/_/id/6895752/smu-mustangs-go-public-interest-joining-big-12
They play in the same market as TCU but have an older and smaller stadium, and a worse football program. Why am I not seeing anything about tv markets being a no brainer obstacle for SMU? Nobody is saying anything about recruiting competition if they are elevated, either. And SMU actually would be elevated, unlike TCU who is already in a BCS conference.
Like I said, the tv markets thing was nowhere near as important as you made it out to be. It's important, but not all that important. And even if it were, Dallas is a huge market anyway so it's not exactly a bad thing to add that market.