Glad you've enjoyed yourself
As for your points,
A gallery is something I've been looking into. I'm currently focused on other game features right now, but might look at getting it implemented eventually. (It'll probably break all previous saves files though.)
As for Lily, she currently has 4 scenes around the house. But I do have plans for a sex dungeon eventually, which will add more scenes for her. When I get around to implementing it, Lily will get more sexual content then.
Sleeping with Lily/Jasmine, could be something I might look into. But right now, I have other scenes that I need to work on first.
Also, Lily is at the Mayors during the day. If I have time, I might look into adding some scenes there.
For dates, there will be more, but it'll probably be story content. For example, maybe in Jasmine story you're out with her for some reason and Lily comes along too.
Jasmine and Lenora will get more sex scenes. When I start work on the next part of their romances/stories, I'll create more scenes then for those two.