Well, I fixed the problem introduced by the Blender 2.80 API change. I also fixed not setting metallic & roughness to 1 when exporting those as a texture.
I have been re-looking at the PBR docs since it was updated for 4.0 to get anything I might have been missing, mainly sheen & clear coat, but I am also seeing that there is now a sub-surface in PBR. I was thinking that we can also get subsuface.tintcolor, pg. Am a little concerned, since the default is Red. Going to add to scene above & see what happens.
Here is a PBR specific mapping:
