Your material nodes were quite clear. They're much cleaner compared to other graphs I've seen.
The only thing that was tough to understand was how the Dither texture actually worked when the nodes go through the MF_Dither material function as there was no comments within that.
I can see the Multiply-floor-divide to pixelate makes sense, and it uses similar nodes to get the Dithering UV, but how the UV coords translate to how much should dither from color step to another is a bit tough to understand.
Overall, Very happy with the material post process, and when the game is further in development I can show how well the post process works.