So I still don't have much free time to start playing with the Content Tool, but I'm following Julian's tutorials on youtube.
I'm thinking maybe you could add a button in this menu which would allow to click on a mesh in the 3D view, and fill in the x,y,z coordinates for the light position.
Currently you have to guess and type, which is very time consuming.
So what do you think, could this be added in the near future?