The only 2 jobs that wear unique armor are NIN (Scouting) and DRG (Maiming). Every other job shares gear. Therefore, a new job like THF or BST (could use Swallows/Thief Swords like Zidane) to share with Scouting gear. Then we could get Viking/Berserker that could have dual hatchets and share Maiming gear with DRG.