This is probably a really big thing to ask, but since the Erotic skill is defined here as one's ability to dominate others sexually, do you think an alternative way of being sexy but in a submissive way would be possible? Like two subskills of Erotic, Submissiveness and Domination, or just a Submissiveness meter that goes up as you're more submissive and down as you're more dominant. You'd start out in the middle, maybe able to change it through character creation, like starting at 5 if max Submissiveness is 10. That would affect erotic actions, with certain characters/enemies being more susceptible to submissive flirting while others are more susceptible to dominant flirting. Alternatively, with the idea of them being separate skills, you could choose to flirt submissively or dominantly, with the effectiveness of either being based on both your general Erotic skill and your sub/dom skill. Perhaps you could also flirt in a way that doesn't lean in either direction, in which case it would depend only on Erotic skill but be a bigger percentage of Erotic. (I don't know what the current damage formula for the game is, sorry.) I know it's a big ask, but I think it'd be a big roleplay/customizability enhancement, especially since, as you said, you're focusing on adding a more balanced amount of sub/dom content. Of course, it's up to you.
Also, are the sewer worms that were in Classic ever going to come back? Do you have plans for that? Are they placed somewhere else and I just haven't explored enough?
One last, unrelated thing: I think the earrings for characters with fox/cat ears would look better if they were set to look like they're attached to the lower, "outside" side of the ear. I hope you know what I mean by that. The ring earrings look awkward at best with the current position, and dangling earrings like the feather or fang ones just look uncomfortable, hanging in front of the soft part of the ear.
I think I've commented on this game before that I really appreciate it, maybe on LD Classic if not Plus, but I wanna say so again. It's so much fun, fantastic example of a good lewd game. It's a bit hard for me to play with no music, though that's mainly a me thing, I don't think that's a problem with most people. I just wish I could pay once to own the full game for the Patreon content, even if I got later updates... Plus I prefer managing my games through the itch.io application instead of manually. But yeah, good game. Love it to bits, love coming back every so often to find new content.