I see why there are requests for artist friendly SSS settings

I watched the video with the dragon on Youtube and I understand that it takes a combination of a shader not and a volume to get an SSS effect. Here's what I don't understand yet. While the volume looks nice and soft, the shader on top, when the opacity is low, is razor sharp. I tried to increase Roughness but this only seems to affect the surface but not the translucency. With this behaviour the I can't get a soft material like wax or translucent plastic. And the shadows show the sharp faces as well.
Here's a render test that shows the problem.

Unfortunately I can't find anything like a material library that I can use to get some insight. Does such a thing exist?
I've also attached the scene if somebody wants to look at the settings.
Cheers for now,
Andreas