I know this has all been done before, because thats where all the inspiration came from. I have created what I am dubbing Mushroom stacks. Using stack-in-card with various mushroom cards I have created cards for different purposes as seen here.
The possibilities are endless, shrooms spread everywhere! Many of the elements open either a tab view, pop-up and even the excellent bubble pop up card. Like this for grouping my sonos speakers
Now I know what a pain it is when you see something cool, but no code, so to say you all the hassle (although thats how you learn) here is these cards. pastebin Credit to many strangers and esp devs who create these cards. mushroom, card_mod, stack-in, bubble, mini-graph and others per your preference.