If C-USA can make this work for everyone involved, the MAC definitely can.
I would rather sit back this year and see what happens. Because the other thing this does too is leave yourself open to potential losses as well. Can very easily be a double-edged sword, similarly to the double-byes in conference tournaments.
For me personally, I always thought the Ivy League had the best answer to the problems faced by mid-majors. But they went and messed that up with a conference tournament and are leaving themselves at the mercy of potentially getting their #4 seed in the dance versus their best team. Let me get back on my rocker before everyone casts stones.
You are definitely right that the best option for getting the best team into the NCAA tournament is for the regular season champ to go. The conference tournaments are all about giving every other team something to play for (and money).
I'm not sure how this scheduling idea will work out either, but for a conference like Conference USA, it's worth a try, and it's a good idea for the MAC to pay attention and see how it plays out. I have concern for certain negative consequences being possible as much as positive ones.