Started this up yesterday. I have to admit I expected the graphics to be roughly the same as Origins. They're way beyond that. So much so that a 2080Ti can't max everything out and maintain 60fps. Dropping the resolution monitor to 80-90% does the trick, though. Love the massive view distance and light effects with the clouds. The people look amazing, too. Gameplay is a little slicker...although why they swapped dodge to X from O boggles my mind. It's like NES games where the B button was for jumping. Luckily it's at least easily editable.
Not sure you should have to chimp on the resolution and especially with that card. If you have G-sync or Freesync then you are set anyways on margin of error.
I would recommend looking at shadows, clouds, AA settings and stuff like that. You really should be able to do 100 percent 4k and work off that and get it where you want it to be.