To people who have framerate issues after the last patch

[Izmael]

Disable Advanced Lightning in Options > Display > Advanced

If this didn't work, exit game, launch again, and click the Options button on the screen right after your have to Accept / Decline the terms of use.

Go through the options, select reset to default.

Relaunch game. This has fixed my framerate issues (was dropping to like 5 FPS in the EC tunnel on a modern comp).