I've made the following change to the OP:
Crackdown 3
2160p Dyn. (avg 2160p, scales horizontally as low as 2304x2160 in rare instances), 30fps
HDR
VRR
Can you elaborate on that further? I set my Xbox to "Atmos" only when I know I am going to play an Atmos title; 7.1 (and lower) feeds stay wrapped within an Atmos container with the Xbox Atmos setting, which prevents my AVR from upmixing those signals to use my overhead speakers (which, hey, I've got 'em, so I wanna us 'em!). Unless something has changed recently...