I didn't really have fps issues myself, save on the (unplayable) Sky Temple stage which has problems on Nvidia cards, but after the patch I've been having some bad drops during intros and after x-rays.

From what I've read though this patch has been the worst for performance. People who didn't have problems before are now having fps spikes. The memory leak is still present causing crashes often. Nvidia cards are also having problems with online KotH matches for some reason in addition to the Sky Temple problems.

Performance for me has been ok. I do crash a lot more often and I have those slow downs with intros and x-rays, but the game is still giving lots of other people issues.

i had solid 60 FPS before patch. Now there are times when it is below 25,after enhaced moves and x-rays. Makes me sad. Also MKX process doesnt close when I exit game but keeps slyly eating 1 GB ram in the background.

If you look up steam the forums are all over the place about hiw deeply they fucked up the game with this patch.

But Reptiles irgans are finally green in jasons fatality, so yay.

https://steamcommunity.com/app/307780/discussions/0/618459297890361704/

Here is the unofficial PC bug list updated post Jason patch.