I think they should have an entertainer class, but not like the SWG entertainer. Think more like the Twin Suns kind of entertainers. Graceful, but deadly.
Entertainer: primarily a Melee class. (choice of 4 sub classes)
-- Hunter - bounty hunter type that can get in close
-- Spy - the best way to gather intel.
-- Medicinal musician - uses music to heal the wounded
-- Mesmerizing performer - Uses their performance to stun their audience
And no don't let them level by just playing a song with a macro running.