New Music app no longer connects to my iTunes music library on Home Sharing

iOS 8.4 removes the ability to subscribe to a shared iTunes Library.

I also relied on this extensively. Quite a shock to lose it. There was no notification.

Eddy Cue tweeted that the feature will be restored in iOS 9.

http://arstechnica.com/apple/2015/07/eddy-cue-apple-working-to-bring-back-itunes -home-sharing-for-ios-9/

iOS 9 release is many months away however.

I used Apple Feedback to request ability to revert in iOS 8 to prior Music app.

https://www.apple.com/feedback/

You may wish to do the same thing.