Shadows in CD are flickering a lot in this game because the shadowmaps are 1024 resolution no matter the settings.
This has been confirmed by Forge from the RenoDx team.
Clouds as well are heavily downgraded in their quality to something like 1/64 res.
As for the blurriness, in this game you need RR on if you have Raytracing, otherwise it will look like crap even with DLSS 4.5. The problem of blurriness even with RR comes from the game having displacement maps which causes the that nasty effect in motion of many assets, particularly the ground which has tons of parallax occlusion.
This is in their list of known issues and they are working to fix it
I think the developers should add higher quality shadow option and better quality clouds in the future. I actually gave them some feedback in their website since they seem to listen and if you guys care, should do the same