As an event photographer I long for speedlight/flash metadata in Lightroom. Every detail would be of value.
It may seem unnecessary but I would think it would be of value to everyone especially event photographers. I often find myself wanting to know the speed light specs/metadata of a shot - to analyze and know what works especially in different venues. I usually shoot in manual but with event photography I can be tweaking all over the place while wondering from room to room with every ambient lighting scenario you can imagine, day and night, indoors and out. Personally for me, as an analytical tool, I would find it as important as any other metadata.
Yeah, that makes sense. I usually get eery when I hear "metadata" because even though Adobe programs allow us to create it, once anything is uploaded online it gets removed. I wish there was a way for it not to be so easily removed. (e.g. Facebook, Twitter, and the likes).