I’m not an expert in this either.
I must say that I DO think Oodle compression does affect the size of lightmaps that are baked with compression disabled, at least it seemed that way based on our project.
That being said, I absolutely agree. I think it would be great if there was at least a lossless (or near lossless) compression option for lightmaps that saved disk space but kept the full quality.
It’s not #1 on my list though right now, there are plenty of improvements to be made with the actual baking quality itself.