I'm actually not a fan of Apple's fondness for tiny icons serving as buttons -- I don't like the Music app interface in that regard, though it's better than in iOS 5. I think in terms of UX the former big rounded squares help users to focus easily on the button area. This is where the tension in design of form vs function plays out. I would've been fine with just flattening those push-buttons and taking out the ridiculous reel-to-reel. But, overall it's still a much better app than what we had before.