Stay in the MAC. Good TV availability (are there any games, aside from Point Park, that aren't on ESPN+?). Good rivalries. Easy road trips for conference games. Decent bowl tie-in's. Cheap travel costs. If your a good coach like Groce, with your program established, your chance dancing in March is at worst, 50/50. Probably better.
The AAC will be completely different in 5 years...and completely different 5 years after that. The Zips sending their baseball team to Wichita? Never in a million years. And on and on and on...
I wish the MAC would have accepted MTSU and WKU. It would have upgraded the conference, with minor impact to the travel budget. Those two schools are different than UMass...Temple...UCF...Marshall...all of whom were looking to leave the MAC the day after they arrived. MTSU and WKU would have been a nice, like-minded fit.
The MAC has survived for 75 years. As it stands today it is perfect for the Zips. Bring on summer football camp!