A fantastic post by
brentcas in The Verge forums ((Still the place to find the best content on The Verge.)) rethinking the app switcher in iOS. I don’t like all of the concepts that he introduces (such as clear all apps), but I think what he shows is a better app switcher.
For starters I like the idea of two dedicated pages, one for settings and another for music, that show page specific controls below the menubar. The double-tap home button is massively convenient, but right now I think Apple is limiting its usefulness too much.