They pretty much are already going to the 4 conf champ model. As to finding a home for those schools it would be quite easy.
FSU, Miami, Clemson, Louisville to the B12 to get to 14
VT to the SEC to get to 15 leaving a post open
UNC, UVA, and Duke realizing the ACC is done go to the B1G
UNC is able to go because they know there is a spot in the SEC for NC St (now 16 teams)
ND then seeing the writing on the wall goes to the B1G (now 16 teams)
GA Tech and MD go to the B12 (now 16 teams)
ACC is down to SU, BC, Wake, and Pitt. Three of which are private schools so no governmental interference
B12
South- FSU, Miami, Clemson, GA Tech
East- WV, Louisville, MD, ISU
North- OU, Okie St, K St, KU
South- Texas, Tech, TCU, Baylor
SEC
N- Tenn, VT, UK, Vandy
S- Bama, Auburn, Miss, Miss St
E- Fla, GA, SC, NC St
W- LSU, Ark, A&M, Mizzou
B1G
N- Mich, Mich St, Illinois, NW
S- ND, Ohio St, UP, Ind
E- PSU, UVA, NC, Duke
W- Neb, Wisc, Iowa, Minn
ACC
BC, UConn, SU, RU, Pitt, Temple, ECU, Wake, UCF, USF
That would be awful for SU but it would be best IMO for the sport.
In addition what if the NCAA allows for a conference playoff if a conference is 18 teams. Currently they allow a CCG if you have two divisions of 6. Well what if they allowed a 3 team conf tourney if you have three divisions of 6? In that case you can add another 6 potential spots that need to be filled.