Here's a thought for a couple of changes. I won't take it personal if you disagree.
-I feel the "playing tracks", as an element, should be called "playing tracks list" -it's just less confusing in my opinion. It is called 'now playing list' in [Preferences>Now Playing], (settings for this element are located here) and I think it should be called 'playing tracks list' here as well, for the sake of consistancy. Also in the 'elements' list in [Preferences>Panels Configuration] it should be called 'playing tracks list. I just feel consistancy in naming is important for learning and ease of navigation.
-In the 'Now Playing' panel, I'd like the 'track information' option to display the information from the 'track information' settings, instead of the fixed fields displayed currently.
-In the 'Now Playing' settings, I think the 'show track information' option should not be listed under the 'playing tracks' heading. It is a separate element and this doesn't make sense, imo.
Just my thoughts. I'm a fan of MB, but I'd like to see navigating the settings get a bit easier for beginners.