[Jtsummers]

You can still add (under Library) Composer as one of the selection options, click Edit in the top right.

However, my problem was (was it in iOS 9?) when they moved Downloaded from a permanently set toggle switch to a folder you selected. Which brought you to the exact same view as Library but with only the music on your device. And if you leave the app you may or may not end up in that same view when you return. It made more sense as a setting that you had to deliberately set or unset, not as a "view" of your content where the default was to use more bandwidth and play things you'd deliberately deleted.