Choppy Graphics when moving Camera
As odd of a request as this might seem, assuming the game isn’t installed on an SSD, have you thought of defragging the drive the game is installed on. Reason I’m suggesting this is the game’s dat file that holds everything is 16GB in size and a patch will rewrite the entire file. If your drive is fairly filled, this could force the dat file to be chopped up and spread out across the entire drive plummeting read performance due to all of the additional seeks.
Again this isn’t a problem with SSDs, never defrag an SSD.
Yes it’s a grasping of straws suggestion. I am assuming of course you’ve already looked to see if you are simply running out of available memory due to other apps running, like a browser with lots of tabs open with animated gif or video ads going.
I also am assuming you’ve rebooted to make sure there isn’t something crashed that is causing mischief like chewing up a chunk of video memory so this game has to swap textures more frequently.
RIP City of Heroes