Yesterday, gnome-music 3.12.1 was released. Most of the changes are fixes to Playlists view, MPRIS, and reload of views when a new song is found.
It is now available for Fedora 20 in GNOME 3.12 COPR repository. If you don’t want to upgrade to GNOME 3.12 (which I recommend), you could use the COPR repository I created for stable gnome-music packages here.
As for the GNOME 3.14 cycle, we have partially ported gnome-music to use libmediaart, bumped gtk+ to 3.10, plus the fixes for GNOME 3.12. You could install the packages for git snapshots here if you like trying out unstable software (though this is what I am using everyday). It has libmediaart if you are still using GNOME 3.10.