what are your specs, because i run the game perfectly fine on all ultra at 1080p.
My specs
I5 2500k
NVIDIA GTX 1050 ti
8GB RAM
if im not mistaken the game seems to be locked at 60 fps, but that's not very much of a problem for me.
My specs are pretty crap. Intel Graphics Card, 4GB RAM, and Intel Pentium. As I said, it's a toaster, but it runs games from of its caliber just fine.
I have been having those problems as well and my computer is beastly. It really sucks cause I want to play this update but can't because of lag.