@Bronson (DBAGibbz) could you explain what the Blender screenshots mean? The 2.79 and 2.80 screenshots are after importing this GLB file into each version?
Fri, Feb 1
Wed, Jan 30
Include most recent documentation changes from GitHub repo.
Corrected a typo.
Tue, Jan 29
Quick ping on this change – I'd like to point new users to this documentation when possible. Thanks!
Jan 7 2019
About glTF export/import losing roughness - roughness is supported, and will be stored in the G channel of a shared occlusion/roughness/metalness texture. There may be some issues merging textures on export, although I think much of that has been fixed recently. See the suggested node structure in the in-progress documentation: https://developer.blender.org/D4082.