I get what you're saying, but I'm curious as to what games do you think are doing it "right" at the moment?
Yeah mind-controlling incest stories were a thing but I can't think of another thing to have actually replaced it so...
BaDIK - good writing. Good characters. Slice of life.
City of Broken Dreamers - Story driven. Good universe building. Realistic characters.
DeLuca - likable characters. Nice backstory. Competent MC.
Primal Instinct - amazing "cinematography." Interesting characters. Mysterious story brewing.
Heavy five - I'm behind on playing this game, but the first release was already real quality. The lore of the universe seen through the ship's console and things like that really add a nice touch. Character behaviors that reflects how you treat them.
Becoming a Rockstar - MC can be a douchebag, but he is generally competent and is pretty "cool." Good set of characters. The girl across the street inviting a stranger into her home to fuck her was a bit random and too unrealistic, but that scene was hot as fuck lol.
I'm sure there are other gems.
Then there are games that focus on fetishes. Japanese NTR stuff. Corruption. The Tyrant. Black/Anime Lilith games. Etc. You won't find amazing writing in most of them, but if the kinks are right for you, you can treat it as a fap game.
I will get around to playing the recent updates, but as far as I've seen MP has no identity. Incest is not even a fetish at this point. Its so overdone that it needs something extra. Maybe an interesting story developing like Primal Instinct or Love and Submission (rip). Or maybe something that just takes the depravity and dials it up like Corruption (this one is getting real old at this point though). Not for me personally, but others like a good romance involving incest. Maybe something like Dreaming of Dana - I did enjoy that one.
Anyways, basically... I think what people want these days are straight up fap games that delivers on their kinks, or a good story with atmosphere and some mystery, or amazing characters that are written intelligently. None of that "Oh my god... I'm hugging my mom and her breasts are touching me... I am a shower peeping virgin asswipe of a MC. I will molest them in their sleep for no apparant reason and build up the lust points. I am a nice guy though." What you need is realistic actions from characters if you are trying to make a serious game, or outlandish porn logic in a faptastic game. When you have retarded characters inside a game that takes itself seriously, it just becomes a pile of turd.
Adding a side note on Melody which seems to be popular but I find pretty dumb. This is a game that suffers greatly from wooden dialogue. Characters have zero personality that sets them apart. They all speak in the same monotonic, formal, robotic way. MC seems like the biggest nice guy(tm) ever. One thing this game does the best out of anything else I've tried is the outfits. Everyone has a normal wardrobe and change outfits everyday. That was so refreshing when I first played Melody.
edit: added Becoming a Rockstar. And some quips about Melody.