Looking at CUSA on the map:
The CUSA East is more geographically coherent next season than it was last season ... a Mid-South division with an island in South Florida and its rich recruiting grounds.
With UAB shutting down, CUSA West can become more geographically coherent than it was going to be with UAB moving over, if it adds a school that makes geographic sense for the Western division.
NMSU is not that school ... it would, in fact, be building a two school island in the rich recruiting grounds of far western Texas and far SE New Mexico, except for the inconvenient fact that its not rich recruiting grounds, which makes it quite insane.
ULouisiana makes a lot of sense, and Louisiana is a top ten recruiting state, but probably faces headwinds from Rice, LA Tech and USM, each of whom seem to think that they are close enough to have access to that part of Louisiana, and would rather be recruiting there against ULousiana in the Sunbelt than ULouisiana as a conference rival.
AR State, Texas State, and USA all have their pros and their cons, but any of the three would make for a more geographically coherent division than what CUSA was planning with the UAB move to the West.
In the end, the most important information for the decision is which option prospective media partners find most appealing, and while there will be endless speculation on that point until the final decision is made, it seems likely that most of it will be idle speculation.
The danger in having two geographically coherent divisions which are not, in any real sense, neighboring geographic areas is the risk of polarizing on divisional lines. Building brand equity as a conference with regular cross-division play is one additional substantial reason to refrain from a 16 member conference unless a media partner says the line-up is a home run that they will pay big bucks for (and as we saw with the Old Big East, even if a conference is glued together on that basis, it can still fracture along its fault lines if the hoped for money fails to materialize in some future bargaining round).