Way back in the day, you could create a custom shuffle of your radio stations via the iOS application. Somewhere along the way, that feature went away. As of today, you can only set a custom shuffle via the web interface. That custom shuffle will play via the iOS app, but what happens if you wnat to change it and you are not near a computer? I am probably showing my age, but I got hooked on Pandora because I could shuffle / customize my radio stations. It would be nice to have this functionality back on the mobile platform.
Moderator Edit: Edited title for clarity