I use my Vero 4k in a purposefully very dark room. Under those circumstances, the LED light from the Vero 4k is very bright. The feature I would most prefer is, when I play a video it would automatically turn itself off. Of course there are other ways to give the user some control over the light, such as 'manually' turning it off all the time.
My current solution is black electrical tape to cover it.
I found other posts (example: https://discourse.osmc.tv/t/option-to-disable-blue-led/36222) saying this feature wasn't going to be pursued but I thought it might be worth repeating.