All of this, and I'd also love a way to pin radio stations.

Google Music keeps track of every radio station you create and listen to, but it is sorted by last played in a single list.

I have 10 radio stations that I really enjoy, but I try to not try out too many new ones in case I lose the ones I really like. It has happened a few times.

The "save queue" option is nice... but it destroys any discoverability off that station because it is now a static playlist.