Just me, or is this ornithology for birds?
I see this as an almost scientific/scholarly exercise in modeling. While the author seems not to start with any intent to "do science" he or she tries to capture a concrete phenomenon abstractly in order to study it more closely, which is arguably at the heart of science or at least some of the sciences. The post is "almost" scholarly because it does not try to look into what others did before or currently, eg. prior…
As to whether this all will be useful for learning how to dance, it remains to be seen. I didn't learn how to dance from diagrams and notation, but I also don't think there's that many good diagrams and notations to learn from, so it's hard to say whether it would have been effective or not. My answer at this point is to try and produce stuff that helps people and see whether it's possible or not.