The UHD722 is now obsolete as it can't do HDMI 2.1 and there are now sources and devices that use it.
The UHD722 and HD622 are also obsolete in the sense that, since the transition to streaming provisioning of content, and that content is DD+ or DD+Atmos, which these devices cannot handle. The problem is that almost all the streaming devices (with the exception of the Apple TV 4k) do not decode this content, because they (utterly reasonably) expect the AVR to do the decoding. But neither the UHD722, HD621 or even a $20,000 861v8 can do what a $250 Yamaha AVR can do. While DD+ is still compressed, it's compressed less.
With regard to the XBox, I strongly recommend getting it to output LPCM. (I assume it can do so - I have a PS4 and it can). The difference between 5.1 DD or DTS and 5.1 LPCM is stunning.
I have used an HDFury Vertex 2, and it was unable to handle 4k60 HDR from my PS4 without black screens of several seconds every few minutes. I spent several hundred dollars just on HDMI cables, including the ones recommended by their support team. I do not have this problem with my UHD722 and PS4.
But I do have a similar problem with, of all things, the only device that can decode DD+ into LPCM, the Apple TV, quite often shows a black screen, and the Apple TV or the UHD722 need to be rebooted.
I am seriously considering the Marantz + analog + 271 TBH, or maybe even Marantz + analog + Dante.