I'm skeptical about this. Schools have been hiring retread coaches for a long time with varying levels of success. The same year that USF hired Strong, Cincy fired Tuberville. (I know, I know, Tuberville was at least nominally not a retread, at least from Tech. But still.)
My thought on this is that, yes, the AAC is clearly a higher step than other G5 schools, but we're not going to be able to poach their coaches because G5 coaches that are worth poaching will generally leapfrog the AAC and land in a P5.
Also, the thought of Sumlin at SMU scares the bejeezus out of me.