unrelated to the MAC, but I believe Tennessee has at least 34 (!) commits already.
I believe another loophole is that you can greyshirt some players and have them count towards next year's class. I believe that is what was done with Bickley.
As for the MAC, WMU and UMASS is the most surprising to me. They picked up Lonnie Johnson (who I really wanted us to get) even after their horrible season. Last year, UMASS brought in a stud at RB and appears to be continuing to do the same even after showing no improvement as a program this season. I'm pretty sure I read that their QB is transferring.