Probably the only thing I really don't like about the new Music app is that artists without a default photo no longer just shows an album cover like it did since the 8.4 redesign. Way back then I sent feedback about letting us attach an image ourselves (similar to how you can add any custom image to a playlist.) Perhaps it's time to send that feedback in again. I'd be happy if iOS 10 at the very least went back to album art if no default picture from iTunes is added, at least there would be an image instead of that plain microphone icon.
Unlike some MR posters though, I will still use the app because I don't over react and refuse to use something just because some aesthetic isn't to my "liking".