Northeast flavor to me would have to include UConn, RU, Buffalo, UMass, Temple to start. Add ECU, Memphis, Army, Navy, Marshall. If Nova continues with their upgrade you have two divisions 5. If Cincy doesn't go you keep them (need them for hoops), otherwise USF and UCF give you a 12 team all sports conference. I'm sure some people would want to puke at that list of schools, but lets face it, it ain't getting much better than that. If Nova upgrades, you leave Marshall out and add the Florida schools, if you get Cincy.
Stay away from another hybrid league, where making moves is too cumbersome due to the different interests of the schools within the conference.