I like the idea of variety coming from items, as for right now I basically know what I'm going to use in every run — Rapier, Reinforced Shield, Stats Gear, Full Plate. Most of toys don't have any use besides being removed in battle. So it would really be cool if some common enemies (common because they're making crowd basically, it won't ruin impression already built for more unique characters) would somehow interact with you using your toys or even theirs. The example we kinda have is the change in behavior of Male Goblin, who will give you a different scene when you're plugged. Imaging Brigand giving you beads run when she's aroused.
And outfits are really having potential to only only be cosmetics, but at least raising Lust more or giving additional Charisma. For example for certain types of enemies, like some will prefer cat suit, and some are really into mare one.
WIth that I'm thinking about additional stance for making love, something like deep casting, only deep romance. Giving you options in more complex foreplaying, that can also involve toys, maybe even having own mechanic of delayed arousal to not be ended so soon. It's just I can't stop feeling all those skills in sex are mostly not worth investing in, because they're changing only the letters in log. And most of love you make ends pretty fast, so it's time to rework this in-battle making out system.