What are some of the issues?
The big one for me is AI, getting rammed on the straights by AI cars overtaking is not cool.
They also brake much later in the corners punting you off and if they do manage to get past then they stand on the brakes mid corner so you run in the back of them.
Large pile ups on the first lap mostly first corner, also corner cutting by AI.
Game save setup is a confusing mess and half the time doesn't work.
Having to go into the hud menu and save the virtual mirror every session or you won't have it in cockpit view.
lack of random start lights allowing anticipation and ramming as in pC1.
End qualifying early and AI set impossible times.
It is overall more stable in fact I've had no pc crashes for months and they seem to have just fixed the constant tire smoke in corners.
I was wrong tyre smoke is still there in faster cars and fast turns, only the player cars is the issue.
I haven't tried MP or VR so I can't say what issues they have.