Sometimes the vanilla brigade mystifies me. How many times do you want to see Ayumi flash her bra or panties and hope to still keep it interesting? What do you fill the rest of the game with? Make it a cohabitation simulator where they work, come home, eat, make sweet love, rinse and repeat? How long do you expect the developer to maintain his interest in what is essentially modeling normal daily life? Anyone excited for the upcoming arc where they pick the right wallpaper color for the living room and she might flash the clerk for 5 seconds? Don't sign me up for that.
The game is of extreme high-quality in terms of production, dialogue, visuals and story-building, so for the vanilla crowd, if the NTS/NTR routes were excluded, it'd be a perfect game - even though this same crowd is usually hypocritical about loving harems; legitimized cheating is only alright if it's you doing it.
I think that unlike some other developers, the issue is that Torimiata "is keeping the door open" to several distinct routes instead of focusing strictly on NTS (an instance where I recall this was swiftly handled was with Le Stag, who clearly and abruptly emphasized his game was a
netorase game where everyone involved was respectful and your girlfriend was romantic, but would be shared), which immediately shut off the vanilla and NTR crowd.
Not that the NTS crew is any less whinier - I recall your girlfriend hooks up with a guy and only tells you after at some point in that game, and someone raged about it in the comments as he considered that NTR (even though the story had built up for the MC to allow her to do it).
You can never please every single fanbase, and F95 has a very uptight attitude about it which wears out the devs - somehow, everyone here acts like they are high paying customers when they rarely contribute with a cent. Go figure.