Didn't notice any. Probably something my TV took care of.Never played UC4 on an OG PS4 but you're literally the first person whose said that. The analysis videos and all the raving comments from people on GAF and here seem to imply the game runs just as well on an OG as it does on a Pro, bar the lower resolution.
@Shyber care to comment ?
Heavy user of smooth/clear motion tech. I play at a pseudo 60FPS feel.