DeaDBeef has support for title formatting scripting, like foobar2000, which allows you to customize group patterns, the converter output, the window titles, etc. to your needs. DeaDBeeF also has a Design Mode, which allows you to add new widgets to the interface and move/delete existing ones.
Is a media player made for GNOME so it does depend on it and follows the GNOME Human Interface Guidelines including GNOME CSD's, symbolic icons, popovers and other GNOME-only conceps. Thus makes Lolypop fell like an alien on otjer desktop environments