Responses
I just went back and looked at what it used to be. (Now I know jackshit about art and colors and drawing, but I still have eyes and opinions so) And it seems like the old art made very good use of shadows, while the new art overuses highlights. That's why everything looks weirdly shiny. When you put highlight on every surface of every frame, nothing is highlighted anymore. "If everyone's Super, then no one is" type situation.
Odd choice to change art style mid-story? I liked the grunginess of the lineart and the cool matte color scheme before. This doesn't look pleasing. They look like dolls that have been dipped in oil and airbrushed. idk