I mean, at least they provided some feedback about it rather than just saying "Game sucks, I'm leaving" like some others do.
I kind of get what they mean. There were a couple opportunities lost in this update for some hanky-panky, but the MC was oblivious.
The scene with Kari and the MC in bed where she is clearly in the mood and on top of the MC for some morning sex, and MC would rather have some coffee. Then the scene in the basement with Lois, where she handcuffs herself. Even on a romantic route, that is the perfect moment for some fun. Lift those arms up and lower them over your head so they are around you and kiss her at least. But MC just unlocks them, and they go on their merry way instead.
Give them some attention and show them they are desired still! MC is on a quest to knock up the world. Your main girls need more attention now than ever, so they don't feel like they are being left behind.
Though I do agree with
akinari2014 about the Kayle thing.
I didn't cum inside her, so how is she pregnant all the sudden? Guessing the variable only reads if you had sex, and not if you actually came inside her. Which doesn't make a lot of sense. That should be changed, as it seems like a bug.