Sonos cover picture

All objects are available to use in panels, except the cover picture. It's only available on the standard control, and it's a shame, because a cover picture is always nice looking, for example on a free positioning panel showing an entire room. Would it be possible to add this cover picture object to the list of available objects ? 

Another nice improvement would be the ability to group players without going through the Sonos App - but of course that's a bit more complicated.