Very good question. This is what we are implementing right now to improve the whole house AV page. Volume feedback for every room with an easy way to control this from that page with a popup and also doing the same as the GUI above for video. Anything else we can do in the whole house AV page? I think that is a very important page that deserves a lot of thought.

By the way the code is quite advance on that page. You can choose a source and then the rooms or choose the rooms and then the source - you can do this both ways. It seems to work but we might change to something simpler and just say there "please choose the rooms and then the source".