I get what you are saying, and I'm glad you enjoyed the game. Here are some of my points:
-What triggered me to answer your comment was the word "lame". It made zero sense for a hentai scene with Atessatia at that moment. She's not convinced yet that you are strong enough to be "the one" for her, if you followed her story. She's very demanding with men. It's part of her appeal and personality.
-I saw you say "but it's a porn game". I consider SC an adult game, not a porn game. What the difference, you might ask: Not everything is about sex.
That's why, besides succubi who actually act like succubi, demons are demons and not hot girls. You have demon plants, demon spider, etc. None of them sexy.
That's why I take my time writing lore and characters motivations.
The moment I start to consider SC a just a "porn game" will be the moment you see me dropping it to work on something else. I have no motivation to work on a "porn game" with dick jokes and all that.
My motivation with SC is to create a world like diablo, but where succubi act like lust demons tempting men.
You however, are free to consider SC whatever you wish to be so.
-You said that adalon hunters like to fuck girls and have no problem. Yes, they do fuck them, no problem at all in that. Once they finish a job is only fair they go to a whore house. Love Interests however, are not whores. Sex will happen when it makes sense, Once you explore them and deepen your bond with them.
-I like to follow the story, what makes sense for each character. They will all have quests that will result in ecchi scenes. Later, once you deepen your bonds with them, these quest will result in sex scenes that will make sense for the story and their personality. The only enemies that use sex openly are succubi, because it's part of their being. They use sex as a weapon against men.