That's fine. We don't gatekeep behind a paywall here lol Of course, my opinion still matters. If I don't like the request, I don't have to include it but I'll hear you out.
In that case I think we need to make more scenes with kisses or group sex, because 2D and 3D games either can't do it at all or do it very poorly. As for the actresses, in addition to the 3 named, there are also Nene Tanaka, Chitose Saegusa, Kanna Shinozaki, Ruri Saijo, Suzu Aikawa, Oda Sakura, Marina Shiraishi, Maria Nagai, Hana Haruna and Nina Nishimura.
It seems to me that the point should be to cover the maximum variety of appearance and character types. Depraved and shy milfs, inexperienced young ones, gal babes, bimpo sluts, slightly plump ones, and so on. And in other games, for some reason, all the actresses are similar in appearance.
Regarding adding a new one, I asked because in the last post you said that you rushed and added others. It turns out that there is a fixed number of women you can add to one game? However, even adding several is a colossal amount of work, I have no doubt about it. I hope that something I wrote will be useful to you.