MC ate Lily while fucking Rachel in one of their threesomes and he ate Maya while fucking Mandy in that threesome, so apparently, he only eats pussy when he's having a threesome and when his dick is the other girl's pussy, but not every time.
Yep, that's the biggest negative of the game. Relationships aren't improving, sexual passion isn't improving (unless you count the sexual interactions between girls). MC is still one-pump chump. I'm not sure if the dev intentionally wants to keep the relationships more light-hearted and fuck-buddy-like, but it's much less interesting than developing deeper relationships. Especially since the plot it so uninteresting that I've yet to find it.
The girls are still fucking hot, though.
There are a few choices early in the game: 13 or 14 in total. I know some of them have minimal impact where they just change the dialogue or the next part of a scene, not sure what others do, but none of them can possibly have a large impact since there have been no choices in more than the past 20 updates. I think maybe the dev wanted to have a choice-driven VN, but changed his mind. At this point, it makes more sense to go back and remove all of the choices and make it a KN, but I doubt it'll happen.