I can attest to the improvement in bed leveling without the leveling feet:
I hadn’t considered the elevation of leveling PEMM nut vs. rolled edges of the framing being at disparate elevations?.. I took a quick look just now and they appear even/flush with each other. This would be a tough measurement to make.
EDIT: I neglected to check the flex on this last depth gauge go-round, but it has to be vastly improved since my initial level assessment. I could easily deflect the wasteboard when the machine was sitting on its leveling feet