The documentation is very good overall. The new section with Blender 2.80 is especially welcome.
What's missing is example node setups to reproduce the effects displayed. (or sample .blend files).
This webpage has great example setups that are very concise:
How to Use PBR Textures in Blender | cgbookcase.com
On the SDK front I could not get the macOS version to run the command line tools information:
Command Line Tools — AMD Radeon ProRender
So I assume there a terminal command for execute permissions missing from the documentation??