I don't know why, but I prefer the old coloring style. It's simple but it works. The new style makes it look a bit cartoonish, for the lack of a better term. It's a bit too bright and colorful, changes the mood and the atmosphere a bit.
I hope one day Eva is going to address issues like certain paths/scenes not making much sense or not working properly. This game has more choices than even Eva has anticipated it seems. Whether she decided to cut them during development or there are bugs preventing them from working properly, this game still needs a couple of patches. Then it'll finally achieve perfection.