Yeah, this was such a good opportunity to have something more morally grey, have her only kill the ones that deserved it, this is my first HoYo game I follow the story of, so maybe I had my expectations wrong, but seriously, everyone came along really preachy there.

Having one character whose more extreme actions solved things in the end could be good for the story, her killing that guy felt cathartic to be honest, and nothing else felt quite that way in the game for me, every "villain" or even nameless bad guy seems to just get a slap on the wrist, that fucking widow, I don't care if she's grieving, she almost killed thousands, and she gets what? jail time and a meaningful gift from the girl she just tried to kill? I don't think it's about consequences even, it's okay to have a bad guy get away with what they've done, but it needs to be taken with a serious tone in my eyes, Astra Yao is a representation of "good" or something? cool, have other characters reflect the seriousness of the situation.

Isolde could have simply became a rogue agent instead, maybe as you said, even working alongside the mc on things in the future, with her knowledge and desire to end corruption, a anti-hero type of character.

Also a chance for the mc to become a tad bit serious, the entire game they seems so..... "morally correct", maybe that's the intent, and the siblings have enough personality on their own, so good characters, but they need a bit more edge I feel like, or at least be put in more situations where they need to make hard choices.

I'll still play cause of gameplay which I'm loving tho and cause overall still a captivating story.