Brilliant MS have managed to make a rubbish music player even worse! Congratulations MS, now missing album artwork and cannot even use MPA Tool to fix it anymore. At least good old Nokia Mix Radio displays my albums correctly so I can just ignore the very very poor apology for an App that is XBM.
Update: Someone suggested using Music Hub Tile app which simply restores the previous WP8.0 music app, installed and hooray album art reappears. Also MPA tool works with this app I believe. MS still need to re-think XBM though.