I don't oppose LLM fiction on principle, and I don't think McCormick does either, but it's just too damn boring to be worthwhile, and I think McCormick hits the nail on the head as to why. This seems like it'll be the last frontier for LLMs, good fiction requires a departure from LLM nature, and that'll inherently be difficult to solve.
I do wonder if you could do something like style transfer on texts? I'm not a very good author either, but occasionally I'll get an idea for a story and wish I had the skill to write it in a way that'd be worth reading, but my poor prose tends to get in the way. Would be cool if I could feed it my poorly written attempts and say basically "this story but in the style of [insert great author]" the way you can snap a photo and get it in the style of a Van Gogh painting.
If nothing else I think I'd enjoy a Tolkien sci fi story, or a Asimov high fantasy.