It is really weird to see Apple returning to boxes and cards again, after they ditched everything for subtle, edge-to-edge designs in iOS 7. I thought the point was to remove visual clutter, not just replace it with translucency. We are coming full circle again and it seems that Apple is using more shadows too.
The music app in particular is the low point, the design is garbage. Supersized fonts, huge margins, no navigation bar, lots of non-standard UI components that you can't find in UIKit. They are even using different levels of translucency now. The result is messy and imbalanced. It is even worse than what Apple did to iTunes back in the days, it looks very foreign instead of being a proper native app.
Apple seems to be losing all the things that I liked about their design language, even if the style itself has not appealed to me since iOS 7.