Nice to see so many Scrivener users here! Thanks for the kind words (I'm the creator, and the developer of the macOS and iOS versions).
Here's something I have found very useful in Scrivener recently, based on a technique I read some authors use for plotting: I create a top-level folder (i.e. a folder on the same level as "Research") in the binder called "Problems", and give it the warning icon (using Documents > Change Icon). In this folder I create documents whose title has a single question, such as, "How do they break into the labs?" Each document is a problem I have with my vague plot, which starts as just a few bullet points and may consist of waypoints as helpful as "They are rescued and taken to safety (by whom? why? where?)". Then I've been writing as many ideas as I can in these "problem" documents, talking to myself until I have an idea that works, which usually spawns other questions and has implications for things I need to fit in earlier in the plot. I then split the editor vertically, with the text of the problems on the right, going through the solutions to flesh out the plot on the left, and using strikethrough to cross out the text I've gone through on the right. I can't remember where I read about this idea of using "problem sheets", but for the first time I've actually got a plot that doesn't end in the middle with an "er, where to go now?", so if anyone gets stuck on their plot during NaNo, I definitely recommend creating a "Problems" folder in your Scrivener project!