They could make it so Archer, a job that has nothing to do with music, becomes a Ranger and make the current Bard an advanced job that you can unlock when you reach lvl 30 with any job. Could keep it in Gridania and you wouldn't need to change it's quests all that much.

However... I would see Bard as more of a caster than a Physical Ranged. So their gear would need to be swapped over to caster type. Which makes more sense as their songs are supposed to inspire others to fight harder. So their songs to attack enemies could give parties a buff while it's casting... provided the cast time was long enough. Or have the current Song rotation be what buffs your parties while you are in those stances and have those Songs effects your damaging song casts in some way. Weapon would be harps probably.