Add/ expand features for media side dock

i really enjoy being able to control my apple music from the left side dock, but it would be nice if i could:

• view album/ song images

• quickly select playlists/ AM mixes

• change button (loop, shuffle volume) sizes

Something else I think would be nice is if the volume slider could also control other apps, so there’s a volume mixer for my browser, apple music, premiere pro, etc.