I've actually made a conscious decision to limit the equipment slots this time (outfit + underwear + three free slots). All equipment items should be destroyable and replaceable by enemies during combat so they can fully fit you in specific class gear during the dungeon run. With twelve slots the enemy would spend too much time just equipping stuff without engaging with any of the other aspects of the game. It also reduces the chance of combinations of items ruining the game, where each turn is half a minute of seeing tokens/actions from all your equipment passing by. I also opted not to use specific slots since you often get overlaps (e.g., armbinder and bondage mittens).
What seems more plausible is to make equipment "upgradeable", so the enemy could replace a blindfold with a bondage hood, which is more heavily cursed and has worse penalties + allowing you to swap out cursed equipment for more severely cursed equipment (which is already a thing in Ero Witches). When things don't fit in the five slots, I'll just merge them together (chastity belt + chastity bra), (blinders + bitgag + pony ears) is what I'll most likely do.
On another note, I'm always open to item suggestions (item + effect). I'm going to need quite some items to populate the game, and it isn't always easy to find good combinations between items and interesting item effects.