Its a way to play your favourite analog game without first picking will facilitate play. If you are forever-Gming, you need this supplement (Also: maybe never roll your rebellion dice). If your group stops rebelling against whoever is GMing, then your group seems to have selected their GM. The group is now encouraged to remove this supplement from the game and continue play throughout the campaign as normal.
I’d like to play this with a rule that everyone hold their Rebellion dice in their fist and hold their fist out away from themselves (forming a circle of fists) at all times, using their free hand to (& to help each other) change dice sets held inside the fists, check notes, eat snacks, mark damage, manage inventory, update goals and doodle. When you rebel, you say your rebel yell and open your closed fist to drop your Rebellion dice. Follow the rules in the supplement and resolve as normal.