Great to hear you want to continue development of this great game!
I do have some feedback on this render of the character models:
The MC, is definately not the same, but in my opinion quite an improvement over the original MC. I like it. Good, strong character who can work well on both the light and the dark paths.
The Daughter, on the other hand, I'm not enthousiastic about if I'm honest.
The original looked like an innocent girl-next-door: pretty but still quite believable.
Your version looks more bimbo-like. Perhaps the clothes also play a part here: the new shirt is too short and the pants are too tight compared to the original. These may be appropriate for the corruption path, at some point, but a good girl who was raised in a convent... I don't think so.
https://f95zone.to/threads/our-fate-a-new-family-v0-15-se-cedsense.7220/#lg=post-366954&slide=1
But I think her figure is also a bit more exaggerated: bigger boobs and bigger butt. I don't think it's an improvement.
The face, also there I have to say I prefer the original. I'm not a big fan of the wider nose and the bigger eyes. Overall, you say you wanted to make the characters look more realistic. In terms of skin texture etc. you have for sure succeeded, but I think in terms of body and face model, the original was more realistic looking, and also more in line with her personality as a smart but somewhat naive good girl.
I think there was someone who made some fan art who more or less nailed the daughter model, it would be my preference to keep it.
BUT! It's just my feedback. Don't let it discourage you. I'd much rather have the game continued with a daughter model which would not be my preference then leave the game as it is now.