I have many stations for various themes, moods and uses. But I also have more general stations. I don't even know if it's possible to do this, but it would be great to combine existing stations (and still leave the stations that were used for the combination as is, just add a new station that combines two or more stations).
For example, I might have a "Mostly Sunny" station (happier, upbeat music), "In Darkness" station and others that are perfect for certain moods or situations. But I also have a larger "Alternative" station, as well as a general one where everything I like (be it alt, indie, classical, soundtracks, electronic, etc.) are all put. It would be great if there was a way we could combine stations that already exist into a new station, while keeping the original ones intact.