I seem to be getting some of sort of memory leak or degration over time.
I'm running on a 1080gtx and game runs super well, extreme settings, medium settings it all works, but no matter setting after being ingame for about 20-30mins using abilities and fighting, everything gets more and more sluggish and it feels like the fps is slowly being eaten up. I don't have any numbers on this yet but it feels like it.
I agree. I'm running a GTX 1060 SC and over time even on low settings the fan on my GPU jumps to 100% this has never happened since I've own the card and I've played everything on HIGH. I thought that by turning all the settings to Low it would stop my fan from hitting such a high setting but it doesn't matter what I do.