I am sure the MAC wouldn't willingly go down to FCS. My vision is a new structure to college football. I doubt Charlie Baker has the imagination for something radical though. Anyway----there is a level of college football that is really semi-pro football. The interest level and attendance is similar to the NFL. A good number of the student athletes are not serious students. There are currently ~130 FBS programs and ~125 FCS programs. I would suggest a three division format instead.
Division A-----This would be the top 64 programs in college football that are playing in your tradition Power 5 level of football. Split the league into 8 regions with 8 teams per region or something to that effect.
Division B----This would be the next 100 or so programs. This would include your traditional crappy lower level FBS teams (e.g. the MAC) and your upper-to-middle tier FCS teams.
Division C----This would be all the rest. Your low level FCS team and your non-scholly programs.
There would be a playoff at each level for the champion. You could have a relegation/move up system for programs that regularly excel or stink at each level.
In some ways, this system already exists. the top-top version of college football is what really captures the national attention....so let's call it what it is. By having regional conferences at the top level, this can limit this silly conference hoping that happens. The TV money for this top tier should be nuts. This would do away with this silliness of barely noticeable football programs jumping to FBS to be non-competitive or play in a bowl game no one cares about. I also think this allows for better competition by placing the sacrificial lambs together at different levels.
I suspect Charlie Baker will continue on with this amateurism farce though with big time college sports. I would just appreciate a return to some regional rivalries and some acknowledgement that there is a huge gap between the top of FBS football and the middle, let alone the bottom. Let's reduce some of the incentives for schools to throw good money after bad pretending they can compete in something they have no business competing in.