playing with boobs too much without releasing lust (Consistently going to bed horny and such) should have some sort of drawback, like you can't wear certain outfits, or you start lactating/swelling your breasts. Gameplaywise I'd love to see larger breasts have a negative, like you have issues with chores, constantly accidentally rest your breasts on your notes your taking because guys are used to sitting closer to the table, and if you don't wear a bra your character has to manually hold up them biddies.
Similarly, I would love to see height decreased further a little, especially tied into the submissive personality she got. the more you resist, the more the nanites make you tiny so you feel small and tiny
Oh my god, she is so cute tiny. Like how tall she is compared to her friend makes her submitting to him all the sweeter lol. And the bigger chest looks amazing. I hope to see both implemented and plenty of torment for the girl in store from both. Lmk if you ever want ideas in that regard lol, she has a Cute blush