It’s not only a matter of removal of purple fringing and chromatic aberrations. Apart from the first image, taken with a fisheye, the others were taken with very sharp modern Nikkor Z lenses which have little or no chromatic aberration or fringing at all.
It’s a matter of plain and simple artifacts introduced by the PL viewer at 70% zoom and below: its rendering is approximated and faulty, and it has to be rewritten from scratch.
This makes it very hard to correctly evaluate color balance and saturation with the image viewed in its entirety.
DXO is perfectly aware of this: I even spoke privately with them a few months ago, and they admitted that the viewer has to be improved “sooner or later”, but it never gets done. After 4 years of complaints!