MAC: We lost to a MAC school the last 2 years. And CUSA, because it is Southern, which is where the recruits are, (sadly) where many MU alumni and friends have had to move to find work, and where the future money is, is still 1000 times a better place to be.
Because NOBODY much cares about the MAC. The Big 10, the regional NFL teams, and the other pro sports soak up 99.9% of the attention. Yes, with solid (or perhaps a little crooked) recruiting an Ohio or Michigan based school can cobble together a solid team, every now and then. And, since several MACers are going to go away in the near future, those that remain will have even stronger teams as the talent will be more concentrated on those that remains.
And nobody cares.
As to the proposed league, well, yes, getting the so-called group of 5 assorted into more geographically logical sections makes sense. Especially for the sports other than football, due to travel.
But I do not see any upside in ODU, GSU, or much to Appy State. CCU is interesting, as it is in a city that has gone from 70K to 310K in 50 years, many of those people with no particular attachment to other teams, at least not those at the G5 level, who might find solid mid-level sports a pleasant diversion, but lets wait and see.