this game is awesome!
i also have some suggestions (warning: essay ahead):
1) scene variety with repeated scenes (i think you did mention this would happen in a post somewhere, but i cant find that post rn so forgive me if i am beating a dead horse). what i mean by this is that some scenes make sense during the story, but when redoing them as an optional thing while "training" the girls the dialog or actions no longer make sense given what else has happened between you two or other characters.
a potential solution? You could simply change the dialog during the scene as a simple 'fix'. A complete new 'post story' scene is also an option, which would potentially make the interaction more natural than just a text change. (and the story scene for those that like that better? in the gallery i suppose)
the one part where something like this is already implemented well is the dungeon's (which i hope gets more content btw!) punishments. The dialog changes based on your standings with that character.
(this is not a big issue at all btw, its just a small something ive picked up on. i know it would require alot of effort and disk space for minimal results, so don't feel obliged to work on it if you don't feel like its worth it).
2) security cameras having more of an effect. I might be wrong here, but right now the only thing to see really is one constant slide per character and the showers, which are also pretty much a once off. I remember being a little disappointed at not being able to spy on maria after finding out she does cam work (i know, i know, my mind's in the gutters)
Do the girls not interact with each other more? such as that maria/android moment? even non sexual stuff like kali playing with someone in the hotel in a 2 player PC game, or a girl watching a movie instead of her usual thing, would add some variety and interest for the camera system.
I would imagine this is something you already want to expand by the time the full game is ready, i just hope you haven't forgotten about it since it became irrelevant pretty early on.
3) the VR set! only having 3 games? (if i am remembering right) is unfortunate, and it kinda feels forgotten as well. i would personally say to worry about that only after the main story is completed to your liking, as from what i understand the VR set is meant for non-cannon fun.
4) the menu-ing is kinda awkward. Thats not really a surprise tho, most H games ive played have awkward menu/ui stuff, lol. I do imagine that it might be made a little smoother (being able to travel from place to place easier) as time goes on.
sorry for the essay, ive just been wanting to share my thoughts since ive played this game about a month ago. keep that in mind here; i have no idea when you actually added what because i joined at the last update, so i apologize for any incorrectness in my comment. I might be forgetting some other stuff too since it has been a while.
Finally made an account pretty much just for this, lol