Regarding the censorship, Yes the mosaic isn't an effect at all it's directly censored in the image.
Redrawing the CG itself is pretty simple however redrawing the sprites is messy since it's using RGB565.
I don't know any way to convert it to RGB888 and convert it back to RGB565 after I'm done editing.
Here is an example of how the sprites look alike.
If you want the CG's it's atached.
Added uncensored CG as well (1 is unfinished).
Let me know if you guys thinks it's decent enough. If yes I will make a quickpatch for those who want them in game.