Here's what I aimed for: lumpley.com/comment.php?entry=22
I think you'll find some significant overlap, yes!
Oh! I see you started out with establishing a sort of security here: Affirmation, permission, robustness. I didn't expect a five year old post, though! Cool!
In my analysis, I'm kind of hinting at the conclusion that Apocalypse World works because of trust between the players. (including MC) It's cool to see you emphasis the same aspect in the design goals as well.
As a psychology student, improv player, and also a human being with my own psychological constructs, I'm
hugely interested in, and fascinated by trust and sense of security, and I think this is the new thing that roleplaying theory needs to explore. Or maybe it already has?