Now that we have linear lighting and physically based rendering, I just wish devs could add better Ambient Occlusion. The shadowing in weapon, hand, behind the cars. .. look a bit flat. I've experimented adding better AO to a19 with Reshade, its a drastic improvement, and added a lot of immersion.
I think Unity Universal Render Pipeline added new modern AO modes, also there is a free plugin "Amplify Occlusion 2.0" based on Ground Truth Ambient Occlusion (GTAO) natively supported on HDRP which is far superior to older SSAO or HBAO, and they claim under 1ms to mid-range GPU at Full HD.
@faatal If its not possible to add new techniques or they are for beffier computers, could be possible to upgrade from AO on/off like now, to AO off/low/medium/high?