Most "unofficial VN remakes" and by most I mean all that I have played are glorified gallery viewers except the choice of the gallery they just go on and on with the story and then have the default renpy text boxes for choices. While I am not a fan of the game UI, which feels slow and unnecessarily complex at times, I definitely don't think a standard remake fixes anything.
I think for a story this big, the usual "unofficial remakes" would make things worse as instead of clicking to move around the map, people would be clicking to go through the dialogues. I have seen that happening with RPGMV remakes. It's not fun at all, I would rather have a real gallery than that.
But I understand the time and effort required for that would be big enough for someone to not do it without any incentive, so it seems unlikely a real VN remake will ever happen.