Big12 should IMHO go west...too much competition in east (ACC, B1G, SEC)...start threatening the P12 and take BYU and BSU/CSU...then add an "east coast" team like Cinci or UCF and get into 3 time zones...this would be very appealing to networks trying to fill coverage all day long.
you could have Texas @ UCF noon kickoff, then Baylor @ TCU 3pm kickoff, then Ok State @ BYU 7pm kick off, then OU @ BSU 10pm kickoff.