Cool supplement! A couple comments on your "government structures" section. Anarchy is not merely defined by "no formal government", it's defined by ideals such as mutual aid, free association, self-management, and radical egalitarianism. "Power struggles define control" makes no sense in defining an anarchist society and order would not be "enforced." Anarchists aren't against organization, they're against HIERARCHICAL organization, as hierarchy is essentially institutionalized authority/power over others.
https://theanarchistlibrary.org/library/morpheus-basic-principles-of-anarchism
Also, why no communism?? You could easily make room for more leftist/utopian systems to explore by combining some of your redundant authoritarian systems.
I'm putting this out there because I think TTRPGs are a great way of exploring different ways of living and structuring societies, and I feel there's not enough of it!