When I take you at face value, it makes even less sense to me. If what you care about is the characters and the plot, you already have those, you wrote them yourself. That's what your 100-200 pages of notes are you mentioned in your previous post. So what exactly is the LLM adding? It's expanding your notes into prose you claim not to care about. You're generating 800 pages of the thing you say doesn't matter to you, which is a lot of effort spent on something you're indifferent to. Also, I do believe that the separation between prose and characters isn't as clean as you suggest.