I don't know that I want any school to chase a greener pasture....just a pasture without so many of it's brothers competing for. Because, the way it's set up now....one or maybe two teams max...might make it out of Ohio from the MAC. Whereas, if they were in different and suitable conferences....then they could bide for two, three or four conference championships(AAC, CUSA, MAC, SBC). Wouldn't that significantly raise the odds of teams from Ohio winning?
Institutional likeness of members will do a lot. Can't imagine the Ivy-like Rice University wanting to be with North Texas and UTSA without there being a SMU or Houston also around, or Tulane or Tulsa.
It's the same with that Ohio MAC cluster. Most of those schools are small national universities with tiny athletic budgets. You get schools like Buffalo, who's AAU, and UMOH, who's an original Public Ivy (ahead/before OSU, no less). When you peg that to what's populating the Sun Belt and CUSA more and more...there's reason to give pause about who you'd rather surround yourself with. Part of what makes the MAC so "stable," or just more consistent, is that these schools understand they are among equals.
This is partly why I think schools like Marshall would come back, or that ODU, Charlotte, or JMU would forgo geography for something better, which the MAC is. JMU turned down the Sun Belt. The CUSA they wanted is now very much like the Sun Belt they turned down. ODU joined CUSA with the support of ECU, who is no longer there. Charlotte used its ties with schools like Tulane, Memphis, USM, and others who used to call Charlotte an equal in the distant past. Those guys? Charlotte's among strangers again (and below ECU).
Heck, it was smarter for JMU, ODU, and Charlotte to join the Sun Belt, but they didn't. That was because of the hierarchy they thought they were committing to. They thought they bought into a higher peg. That isn't the case anymore...which is why the MAC may look more appealing.