On the topic of Subplots, I recently viewed a handwritten outline of The Order of the Phoenix by JK Rowling (see photos), and I am curious as to how one would analyze this draft. Would you consider these plot threads as the inner-workings of a single Storyform or as Subplot extensions, dipping into various Storyforms and selecting certain Throughlines, possibly down to the Concerns?
For Subplots, how much of the Storyform is necessary to weave a Mystery Subplot, for example, into the main Storyform? All four Throughlines, with or without Concerns? Or, rather, would it be just as feasible to assign Genres to each of the four Throughlines in the main Storyform and scrap a Subplot, assigning, say, the IC Throughline as a Mystery?