Come to think of it, how about the FBS should sub-divided into two sections: The BCS section (those representing the new playoff format starting in 2014 and former AQ leagues: ACC, SEC, Big TEN, Big 12 and Pac-12); and the new FBS section (those representing the former non-AQ leagues: MAC, C-USA, MWC, Sun Belt and AAC [formerly the Big East])
It already is that way, the AQs each have autobids while the nonAQs all share one, the AQs have nearly 1000% more money (AQ~20-30mil/yr/perschool nonAQ~2mil-less/yr/perschool), better schools/academics, TV exposure, press coverage, bowl contracts, etc.
The money they'll get off of body bag games with the big boys, the occasional visit from big state U, the random bowl payouts and the distribution from the playoff+BCS type elite bowls will always outweigh starting any midlevel playoff system between the FCS/FBS which they would obviously need another FCS conference or two to join up with them to make everything work (or more if they can't get the MWC/AAC) which means more mouths to feed. And just try to tell Boise St, Northern Illinois, or Houston that they'll have to choose NOT to play a school like Florida State in the Orange Bowl in order to play some random other nonAQ schools in Indy or Detroit...it'll never happen.
The only way any of this happens is if the AQ conferences just decide not to include the gang of 5 in their post season anymore and cuts them off from the 'BCS' bowl bids AND the payout, then and only then will they try to start some sort of D1-A.5 division.
Fan of the Big 12 Conference, the Mountain West Conference and...