Ok I have some issues with the new apps that are split from iTunes. It feels like iOS now, which I don't like.
First off, in Music when you open an Album, it doesn't open it on the same page as before, it opens a new page - which I definitely not enjoy.
In Podcasts - I used to have podcasts that I wasn't subscribed and was able to stream episodes either I downloaded them or not. Now they don't show up at all.
In Books - I used to have Audiobooks that were split into chapters. Now I can't even open up to see what's playing.
Another weird gimmick - starting to play a podcast should stop music from playing.