Just leave the global on and brightness at full.
Going forward I am considering making a big change to using a bridge and thing. The bridge gets the global controls and then each sub thing is how the binding is now. For people that use segments this will mean performance gains as the bridge will parse only once for all segments.
It should be possible to leave a direct thing in place and not cause breaking changes when this is done so you don’t have to move to the bridge design unless you want the global control.
Those future planned changes I did not want to make before a stable release and wanted to think it over before diving in. I still don’t see another way that makes sense for reducing the load when someone has a lot of segments.