please reduce wasted screen real estate in the desktop client. Right now, there is too much wasted space that could have been leveraged.
Here are my main gripes:
1: I admit that there is not too much you can fill this area with, but you could move the menu bar and the window title there. Now, two "lines" are essentially lost.
2: Fill this area with information and statistics. And for God's sake, why do you not let users add descriptions to their playlists? Partners and labels can, so why can't we?
3: Why did you add this space? I see no logic behind it. And the play button that appears when you hover over a list item is completely unnecessary. Just double click. It's much faster, as you don't have to move the mouse to that tiny little are on the screen. And if people don't know that they can double click to play a song, they should not be using a computer. All major OS' use double clicking for various tasks.
4: There is absolutely no reasy why this space should be there!
5: Reduce the space between people in the activity feed, so that you can see more of them!
6: Reduce the space between list items. It might be easier on the eyes if there is a large amount of line spacing, but it makes for a tedious and inconvenient browsing experience.
My suggestion for the UI:
(Some line spaces are uneven, because I used Photoshop.)