Good stuff! I've been following along with Shawn Coyne's "Story Grid" podcasts where he, as a long-time story editor, has developed his own methods and formulas, some based on Robert McKee's stuff. The one thing I find very true that he espouses is, master the scene and you'll master story (which makes me think of the fractal nature within).
The one thing that caught my attention in his most recent podcast was where he took McKee's concept of the value in the scene going from positive to negative (or vice versa), but using the value itself as what's at stake within the scene. Of course, it's much less regimented than with Dramatica's PSR, so I went back and reread Armando's chapter and realized, with the "Z" pattern, it's essentially a scene, scene with a turn, scene - but as Jim mentioned, it kind of becomes a black hole when dealing with those independent scenes and from my own personal experience, they may have been perhaps set-ups and payoffs or static, ultimately more "sequence" driven than scene driven.
This gives me a new perspective to be able to shape those "scenes," though I haven't given much thought to using the variations as "stakes" vs. concepts explored. For instance, Worth, Confidence, Worry, and Value equates to Confidence/Worry naturally opposed and fitting together in a single scene. PRCO, however, can be applied to "Worth," making it more dynamic, fuller, and less likely to be explored via a single line of dialogue.