Well......IF and that's a BIG IF....my BE proposal happend, how would you see CUSA shake out? Who would be left to make CUSA a viable option?
La. Lafayette has a great womens basketball program, very good baseball program and a decent mens basketball team.
La Laf has a great women's SOFTBALL program (their women's hoops has never made postseason in its history); in men's hoops, they have won 1 NCAA tourney game without cheating (they have won the auto bid from the sunbelt with regularity, for whatever that's worth) and their football program is probably the least accomplished in the history of the NCAA - it's awful.
That's the point. C-USA wouldn't expand past 9 or so. Nothing says they must go to 12.
Your proposal is pie in the sky anyway. USM and UAB have zero chance for the BE. The lowest budgets in c-usa - and you can see it in their minor sports which they barely fund - close to the worst in c-usa. (USM is the worst; UAB is second-division).