It's only a proposal at this stage. If people think it has value here, that's fine.
I mentioned Omnium because writing in the Novels category does, by inference, require an author to submit more than one chapter and if they're all reassigned they would (currently) lose the badge unless there are code changes behind the scenes to ignore it while stories are gradually reassigned.
Last time I checked, changing category alone does not trigger a resub for mod approval. But if we have a bunch of stories to change, it's easier to throw a list at the developers and they can switch the categories directly anyway.
The thing about Novels is it conveys no additional info. It's like the dreaded 'Miscellaneous' problem. Doesn't fit anywhere overall, so dump it there.
But each chapter must be about something so, from my view, it should go in the relevant category. Let's take a fictitious BDSM story (overall) as an example called Kate's Awakening. Create a series called that and then start writing a few chapters...
1. She's unfulfilled with her partner. Sex is average at best and she wonders if there's more to it. [Straight Sex].
2. She meets a guy in a coffee shop who has this gravitas about him that takes her breath away. She fantasises about him at night. [Masturbation].
3. She is intrigued and when she sees him again, he introduces her to his dominant ways but she isn't sure. [Reluctance].
4. Reliving the naughty encounter, she gets wet and goes back to see him. Offers herself and he puts her over his knee. [Spanking].
5. She thinks about him all the next day. Can't concentrate at work. She calls him and he tells her to go to the bathroom, remove her panties and masturbate, his voice in her ear the whole time. [Masturbation, or maybe Office Sex].
6. She is more besotted and goes to his house. She's introduced to some restraints in his dungeon and he spanks her while tied up. [BDSM].
7. She craves more. He uses the nipple clamps, paddle and crop on her. [BDSM].
8. ...
By doing it that way, you're exposing your work to people who do camp in, say, the Masturbation category as they like that type of story. If they only read chapter 2, so be it. They're happy because you as an author have got them off. And if they really like your work, there's a tantalizing Next Chapter button at the bottom, which might open their eyes to more variety. They may enjoy it. You might get a new follower.
There's no chasing categories to find works because the Series Link ties them together. Next/Previous and the table of comtents are available on every story. If you read Ch 2, you might like to find out what led her to it and go back to Ch 1 for the introduction.
If all chapters are in Novels, you lose that important categorisation. Sure, you can use tags, but tags aren't all that useful at the moment. We have tags for spanking, ass spanking, bare handed spanking, first time spanking, crop spanking, femdom spanking, and so on. People aren't going to follow them all, so if you choose 'bare handed spanking' as a tag you've potentially missed people who browse the 'spanking' tag. But people who like spanking do check the Spanking category for new stories. Regularly.
As I say, it's only a proposal. I happen to think it improves the experience for readers to access content (chapters) they're interested in without authors having to keyword-stuff the titles and hope someone searches for it. And it gives authors more control over breaking multi-chapter pieces up into categories that more closely align with what readers can expect to find.