Played for a couple hours last night using the Beta patch, and all I can say is that if this is better than how the game ran prior to the patch... Woof. I'm on a 1070 using the Nvidia hot fix drivers.
4k, even at 30 seems to be out. Looks like that's using 100% of my GPU. Was seeing dips there, to say nothing of the awful frame pacing. I don't know that I've seen a game do that on my 1070 before. Usually it's just a question of whether 30fps at 4k is alright with me.
Dropping to 1080, the age quality is a lot tougher, but even in Karnaka, I can keep a steady 60. Unlocking the framerare is a nightmare as it lurches wildly from the 120+ to 40s. Playing with settings seemed to do very little. The biggest issue though is there are times where it looks like 20 feet in front of my character, there are blotches of areas that are just an awful blur. Looks terrible.
On top of this, there are massive amounts of pop in and geometry being drawn in right before your eyes. You can watch a cliff assemble itself as you walk toward it or see the shadows draw themselves in as you slowly walk around that opening area on mission 2. That's all on ultra!
I was so looking forward to playing this, but honestly, I'm appalled at the amount of work that needs to be done.