There's a maximum of like 10 teams that will finish 8-3 for at-large in the "power" conferences, with many of them likely not finishing that high.

I don't see JSU or Wofford getting left out at 8-3. The playoff committee is not going to put 2 7-4 CAA/MVFC teams over 8-3 JSU/Wofford (especially not Wofford with a top 25 win). They aren't going to make it the MVFC/CAA open.