It would be interesting to see more public nudity outside of the beach, say high passive voyeurism characters have a chance to go topless or bottomless, as well as having NPCs go barefoot or adjusting NPC clothing item chances like with hair models in the world generation. It would also be good to have a little tighter control on NPC promiscuity and relationship generation in the world generation menu, like changing the number of NPCs that start the game in an existing relationship.
Also, I've noticed that changing outfits causes NPCs to start using hair models/face shapes/etc. that have been set to zero, not sure what causes that issue. Game is otherwise pretty solid though.