First, no one wants WVU. They would suck up money and provide nothing.
Second, if ND wanted to join full time and it was 15 teams, you could go to 3 pods of 5 teams. For example:
South - GT, FSU, Clemson, Louisville, VT
Mid-ATL - UNC, Duke, NC State, Wake, UVA
ND POD - ND, Miami, Pitt, BC...