GO FOR IT MICCHAN, SPOIL YO GIRL!
I might be misremembering things, but when Korisu was first getting introduced, wasn't it implied that there were some problems with her home life, like she was on her own FAR too often or her parents were different? Something about her mother, this chapter, feels off. Not in the sense that she's poorly written, but more in the "there's something going on there," way.
Korisu's mom doesn't seem like a bad person at a glance but that doesn't mean that their living situation can't be terrible beyond her ability to deal with anyway. Japan already has cultural problems with overworking people to the point where a lot of families are effectively living split apart from each other for work- or education reasons.
The disparity you're sensing might come from the expectation that Korisu was being neglected due to her parents not caring enough about her (Which is the more "common" cause of neglect in the western consciousness), while the new chapter instead seems to go down the road of implying that the issue is not that her mom (who seems like a single parent?) doesn't care but rather than she has to work too much to spend time together. (Which I believe is the primary reason for neglect in Japan but I'm not an expert so don't quote me on that.)
Both situations are still Korisu being "neglected" just for entirely different reasons and the latter meaning that her mom isn't strictly (necessarily) at fault. We really don't have much information to go on at this point though so it could go in any direction from here I think.
One possible angle that this new chapter doesn't particularly support nor deny though is whatever factor in this her father might be playing. Is he alive? Is he around? Does he want anything to do with his family, or is he actively fighting a legal battle against them to avoid the responsibilities he might have to them? Are they in financial troubles because of something he did? Or did he maybe just die and Korisu's mom is simply struggling to be a single-parent breadwinner? Was he a one-night stand that she never saw again and who doesn't even know that he's a father?
Technically, it's possible that Korisu's neglect issues were already dealt with semi-offscreen since it appears that Kiwi and Utena keeping her company is now implied to have become part of an official arrangement they have with her mother specifically so she isn't so lonely. At this point it could just be a matter of whether Korisu has any trauma lingering from her days of neglect that needs dealing with rather than any current neglect still needing to be addressed.
Korisu's neglect really could go anywhere from here, or nowhere at all if the writer decides to do that. It's a case of Schrödinger's Neglect, if you will. xD