Really liking the 6.1 demo you have running! Moving the top menu to the side bar makes the UI feel so much cleaner. One thing I am going to miss, however, is having the artist list on the side bar. The index page is great, however personally it gives me a little bit of a headache not having it as a pure vertical list like you would normally see on media libraries. Is it possible to put a toggle button on the side bar to switch the side frame back and forth between a classic style sidebar artist list and the new "menu sidebar"? If so I think it would be an amazing feature!
Also, I know I've said this before, but I would like to mention again that I really miss having the broadcast tab as its own frame on the right side. It was just so convenient to be able to see what other people are listening to and being able to chat without switching to the broadcast tab. Otherwise a lot of users don't use the chat function at all.
Thanks for your consideration and hard work!