Well, what we have seen in the past, that this is certainly is applicable in "traditional" SLR-/SLM photography with well-built lenses, but as with the
M2P, changing the aperture higher than f 4 made the image overall softer and soft corners not sharper. It even was no real difference beyond f 2.8 most of the times. It may have changed with the bigger sensor, but I guess, we have to live with soft or shifted softness or test a bunch of them and decide which is best as a better lens formulare certainly would need more space. I returned my first
M2P for ridiculous soft areas (thread might be here somewhere). My 2nd is ok, while the left corners a still a bit softer than the right.
Interesting to see more real world DNG and not from promotional or selected drones.
PS: Certainly the converters will gain in performance, but visible declining sharpness from centre to corners without any post-sharpening is something that should not be primarly corrected in software (if even possible to the same extent).