I am using Resolve to quickly convert the files from XAVC to ProRes or DNx. Then moving to editorial. I find the trans-code necessary because not all editorial departments are using “up to date” version’s of their NLE. So using these flavors I know they at least can open the files and move on. I then re-conform the edit back in Resolve linking to the 4k XAVC files and do final grade and finishing.
I agree that the XAVC looks really nice. For a very lightweight file it holds up surprisingly well. And on a simple DIT laptop station you can render out dailies fast. I would consider this a nice flavor to work on TV projects and shoot UltraHD.
BTW, you need to use the Resolve version above 9.1 and above to support the XAVC native.