The problem is that it would have been interesting to have one of your raw, to see what the visualization looks like on our workstations/configurations. Here you are showing us an example that is actually very telling… on your screen.
But I downloaded two .raf files from Imaging Resource, one from X-H1 and one from X100s and opened them in PhotoLab applying the “DxO Sandard” preset.
Result: I see absolutely no difference in sharpness or artifacts between displaying at 100% screen in PL 5.1.2 and displaying the jpeg output in ACDSee or Photoshop. No more in the PL window in comparison mode. And the test with a linear dng sent in ACR is identical.
On the other hand, I notice a difference in colorimetry / saturation which is noticeable and which should be looked into. Maybe due to an output profile problem.