Glad its not just me experiencing issues with this update. Lost close to 100 fps average, down fromy my monitor’s refresh rate of 240hz, but at least I can play without crashing 
Coincidentally, I also play destiny 2 a fair bit and my fps in that have taken a similar hit with the latest update.
Anything without an online, multiplayer component however is fine. Doesn’t excuse Blizzard OR Bungie however.