It's handy that you can create a playlist by dragging files to the playlist node. It would be even better if you could do the same thing by dragging to a specific folder and have the new playlist appear there. And/or have a <New Playlist> option for the folders in the right cilck menu.
A tiny thing but seems logical: right now, if you create a folder it appears after all the other folders AND all the other playlists. Since folders are sorted before playlists, shouldn't it appear before the playlists?