Though, I don't think their core beliefs have changed.
This is something that's hard for me to judge. After much contemplation, I have concluded it's hard enough to model characters normally, yet here we have potential brainwashing / skinwalking / unrealness complicating matters to nearly never before seen levels.
For example: is it a core belief of Kirin changing for her to quickly get over her sister being sexually assaulted? If we imagine Kirin as a real human being, I think she may have stabbed a bitch.
Is it a core belief of Futaba changing for her to be livid at Nodoka for exposing her private life, only to seemingly forget this and now feel totally fine with her class cheering her on as she publicly paws for sensei cock? If we imagine her as a normal girl, I think she would have died of embarrassment on the spot.
Is it a core belief of Chika changing for her to stop believing that love is monog- ahaha, I don't even have to finish this one.
(Universally: at this point, I feel there's no way the whole class is so comfortable with polyamory... it'd be a huge coincidence if almost are of them share the core belief it's okay for 1 adult man to fuck 20 teenagers at once.)
Another interesting thing is how getting Ayane to accept the harem was once an excruciating character-defining scene centering around the list, but now she seemingly doesn't remember the list, but is still totally okay with it.
Of course, an excellent aspect of fiction is that characters are black boxes of infinite depth which can surprise and delight, so I profess zero mastery or total knowledge regarding their core beliefs, but this update (along with some prior) did seem to reach the point of core aspects of characters being altered/modified such that they are increasingly a bit unrecognizable. I may be totally off base though. All I can really say is that the intuition within me which provides positive/negative responses to what I'm reading has stopped providing positive responses to the interactions between heroines who I find myself increasingly struggle to recognize. And, I admit, some of this must be inspired by my knowledge of Selebus's promise to have 'threesomes of each dorm' and 'every incest combination,' because if things feel bad to me now, I can only imagine how it will be when it really is a 20-girl orgy.
But indeed, that may be the point. I really hope it isn't since it is incorrigibly a western author thing to distort characters for their metaphysical points, but we shall see.