Thanks for the feedback!
1. I agree about the nipples under the clothes, I drew them on the pink top and didn't think about the previous clothes - suggestion accepted.
2. About the silhouette of the accessories under the clothes - do you think it's worth doing such details? Right now I'm just hiding for part of the stuff.
3. About the large amount of switching I agree. I still want to do layer switching on belts so they can be worn over clothes, but haven't figured out how to do it yet. But there will definitely be some clues - I'm already confused about what's what.
4. I have a sprite of breasts without bra support, so I thought the current option is a push-up =)
5. Breast size slider is interesting. I'm now using Spine2D to render the girl in the game and it allows me to make such a slider. Yeah, I think it could work.
I'd be happy to have more suggestions