I was actually really hoping for an update like this. I was hoping for a chance to focus on one character. Though I do worry about what Sakuya would do if you reject her, I am also curious about what would happen if you only focus on her. Maybe she doesn't kidnap the protagonist during that path, or maybe nobody tries to rescue you?
This. Her path is going to need some SERIOUS reworking if you go the mono route.
If she's the only one you choose, you can erase much of the yandere parts of her route and make it more like MC just came to like her regularly. Because of this: she can have less crazy girl sex scenes (or you can still have them but be more like shy girl in public yet a freak in the bed). Never any need to let MC know she's been protecting him from the shadows. No kidnapping scene. More wholesome reason to visit onsen area.
On the other hand: you can make her even MORE crazy if she's the only one you reject, you go mono with her by friend/son zoning Asami and Yasuka but then go down either Dom/Femdom routes with Noriko, she joins in on you blackmailing Noriko because she knows how Noriko use to treat you.
To be honest very interesting idea but RNG is pretty much 3x the amount of work they have to do. But if I can get a non-cray cray route for Sakura, I'll accept RNG's sacrifice.