Nah, I am not saying that Rework is bad or shouldn't be there. But I think it should have been done in Parallel to Regular Story Progression and been included in Regular Updates and Releases.
I think that would be a huge mistake. Most devs, not all; can't really handle doing two giant projects at the same time.
It would split focus unless the team and rigs are big enough to handle doing them side by side. So one part would suffer.
I understand that people now a days don't have patience anymore. But pushing out both a remake and progressing the story at the same time, to me sounds like a lot more problems than the comfort it would give some people.
Personally I prefer a dev to make the vn totally then remake. That said it is up to each dev to decide how to make their project. Over doing it usually leads to abandonment or a rushed vn that disappoints.
This dev seems to have things under control. They just need their follows to be patient some is all. Unless the doctor told you only have weeks or months to live, it should work out.