Does anybody know, what the OpenXR Developer Tools does, when you leave Custom Render Scale unchecked? Does it (auto)select its own render scale based on FPS, or what? I agree with the OP, that everything under TAA 100 in A320NX at least is very blurry and badly readable. I get best results with TAA100 and SS unchecked (reprojection off) on 5800X with 2080 Super. Maybe a bit of stuttering at heavy loaded airports.
Greetings, Alex