The PCL has chronic movement of it's teams. Tucson and El Paso seem to each get a team every decade or so and then it moves away. Up until recently there were teams in Portland, Calgary and Edmonton,
There will not be an AAA team in an exurb like Gwynnett anytime soon. That has been a disaster for the IL, since it's pretty far from everywhere else and with the Atlanta airport an hour away. If the IL could build a time machine, they would have denied the move from Richmond.
One thing that would be interesting would be to move Memphis and Nashville from the PCL to the IL. They got dumped in the PCL when the American Association disbanded back in the late 90s, but they are geographically a better fit with the IL.