I think I finally got mine to my liking. I am using a 4k HDR TV. Left cfg. to defaults. I think these settings are now “optimized” for HDR TVs since the xbox release. Changed my output source on TV to Game console and game mode. This gave me a pretty noisy picture especially over water so used TV settings to bring down sharpness and contrast a bit.
In sim;
Bloom off
HDR on
NVCP;
Tweaked colors gamma etc. to my liking and use these settings
SU5 graphics quality - #629 by scriptkid scroll down a bit
Of course your mileage may vary. SDR monitors especially. I think they have it defaulted/changed things now to look best on HDR 4k TVs to suite Xbox
And now just in time for a hotfix. Hope it dos not put me back to square one 