I honestly don't, but I think the "successful decision" here was fairly unique to NIU. More money from the MWC and a more local set of rivals in a league that's probably more suited to all their other sports.
The "MWC - Horizon League" move would not be as fruitful for Akron/Kent, though adding YSU twice in basketball wouldn't be the end of the world. I think there is a path for Akron to make a move in that realm that would work, but I think you're right (at least, together as a group of the six Ohio MAC schools).