Ha, I happen to be partway through writing an essay which has a significant Venn-diagram overlap with this one. I feel a wee bit scooped! but that's okay; I'm more happy to have the confirmation that my thinking / pattern-spotting is on a valid track.

Plus you've gone into a few things here that I intended to skip over. I'll link to this piece from mine when it goes live, prolly a week to ten days from now. Cheers!