I got a burst of energy back in October which gave me the energy for the November release. I was hoping to get new outfits added to Rika for Christmas, however we ran into technical problems as my modeler was using an old version of Rika which had huge incompatibilities with the version I was using. You can see some of the issues below.
We were able to get her updated model compatible with her existing clothes after some finagling, but we weren't able to get her Christmas outfits updated before the holidays were over; and it takes forever to get anything from my modeler. For a game about stripping, adding clothes seems counter-productive.
The Roshutsu source project is a monstrosity and is plagued with half-baked implementations. Coupled with lack of direction, it makes coming back to the project difficult. Whenever I open the project, I think "WTF am I supposed to do?"
Sounds like you need a new modeller, just like a bad chef on Kitchen Nightmares, he's bringing your "Restaurant" down by being out of date and taking forever.
I feel you on the last part though, that's why my own exhibitionism game is sittin there unfinished. I've gone back to it multiple times and I'm just like...what the fuck was I doing again? How did I do that trick? Fuck. lol
As for clothes in an exhibitionism game, that's exactly it - you want variety in
what you strip, or say, a jacket that doesn't quite cover the genitals but the character is internally thinking "I hope it's hiding my naughty bits", instilling that unknown and panic into her mindset. Same with shorter skirts, band-aids, some of those examples you posted, etc. The whole "walking behind someone while exposing yourself" is more fun if you like the outfit too, a tank top, a different t-shirt, a barely-covering tube top; skirts, mini-skirts, unbuttoned/unzipped jeans, and the most traditional exhibitionist outfit of all, the trenchcoat with nothing under it.
I strongly urge you to look at the Seleka game I linked earlier and take some inspiration/ideas from it; there's no shame in it, only opportunities for Rika's shame.