In my opinion, when you don't hear complaints, it should mean that you have created/designed something right.
In this case, there are so many things wrong with this new iTunes that it outweighs any new added features.
Again, in my opinion, Apple is trying to add new features just for the sake of adding new features. Nothing to do with usability but more for a "WOW.." factor. It might have more features now, but overall it's a worse music player. I don't know anybody that has a mac computer, that uses iTunes for their video player. And for that reason, it goes to show you that when you try to make a program that "Does-it-all", the things that it does do well start to suffer.
Stop adding buttons! The fact that there is now a little button on the right hand side of the window to give me my mini-player is rediculous. The fact that I have to click another little button in a different location to maximize my player is rediculous. Why is Apple trying to junk up their interface with MORE BUTTONS!?!? The old three (Red, Yellow, Green) button for minimizing, maximizing, mini-player, etc.. work just fine and it's something we're all used to. Add MORE BUTTONS doesn't make anything easier.
Don't get me started on this new opposite diagonal button. WTH would any use that? I don't need iTunes to take over my desktop. It's not that great of a program. So again, we have ANOTHER BUTTON. Was the green button not good enough?
STOP ADDING BUTTONS!