Just a thought... but can you make the shaders work with skins that don't have face seams? You mentioned that you're seeing that a lot lately.
I only have a few skins behaving that way, V8 comes to mind...
I got the model designer to fix this one... mostly kinda sorta... (Often you can argue that they claim it works with 3Delight, and those seams show up there.);
https://www.daz3d.com/teen-princess-lei ... 3-female-s Anyways, I think it would be better to simply talk about how to adjust the shaders for what are showing up as problem areas, like the face.
On another note.. I had no issues with the new G3M shaders, but same issues with V8... and V8 is full of seams on the face, etc.