I've been working on an alternate model for analyzing roleplaying to the Big Model--here it is!
It incorporates some of Luhmann's work on interlocking but operationally closed systems and looks a bit closer at the process by which the Shared Imagined Space gets created. I'm also just in general leaning hard towards description and away from prescription.
https://baatag.blogspot.com/2023/05/rpg-as-system-taking-my-shot-at-ron.html