I love this software, but a few missing features would be a great addition:
1: Render each light to a seperate lightmap and then add them together in the editor. This will allow the user to change individual light strength and colour on a per light basis without having to re-bake. Collapse to single lightmap on upload/bundle creation. Similar to how corona does it (below) and redshift (light groups)
2: Get reflection parameters and bump map parameters from imported fbx file.
3: maintain light instances from fbx file (or have a naming convention rule), or perhaps convert groups to instances (if fbx instancing doesnt support lights?)
4: Export geometry (including new lightmap uv’s) and materials back to fbx, so that the user can render out light maps externally. I use redshift personally, so the render times would be hugely faster than cycles (particulary as it’s been reprogrammmed to take advantage of the new nvidia RTX hardware raytracing cores
5: Import lightmaps (so step 4 is useable).