I have the same issue with frame rate dropping however in addition to that the visual fidelity also seems to have dropped massively, looks like im playing on a 720p or something.
I have a Intel 12th gen I9 with a NVIDIA GeForce RTX 3060 laptop GPU and 32GB of RAM.
Interestingly a problem i had from the beta has continued over into launch where when detecting my hardware settings in the game launcher instead of saying it is useing the 3060 it is using the built in GPU; the name of which is Intel(R) UHD Graphics, however this other problem still does not explain the massive drop in frames and fidelity i have experienced with the launch update.