I've been thinking about how to further fine tune my skin and there is one area that could use more customization, the Now Playing node.
The playing tracks panel (right sidebar) in Now Playing currently takes its colors from "Content[TrackDetail]", but ideally I would rather it take colors from "NowPlayingList[TrackDetail]". If this were the case, the neighboring panel (main panel right side) would probably also take its colors from "NowPlayingList[TrackDetail].ListAlternating.Default".
Alternatively, maybe it would be best to have overrides specifically for the Now Playing node, both for the playing tracks panel and the lyrics/biography panel. For example; "NowPlayingNode.List[TrackDetail]" and "Panel.NowPlayingNode.ChildBody".
Here's a couple pictures to demonstrate my proposal (you may need to flip between the images to see the contrast).
First image, how it looks now:
http://i.imgur.com/5HyAqOS.jpgSecond image, how I would like it to look:
http://i.imgur.com/R6mOXkE.jpg