I think it would be pretty cool if square added jobs that require a certain level requirement of two or more other jobs in order to obtain 1 special “advance” job class (kind of like tactics). These “advance” jobs would merely be regular jobs in stats (maybe the tiniest bit stronger sense you’re combining soul crystals), but more unique to their predecessors.

Ex: leveling jobs to 80

Paladin + Dark Knight = Temple Knight

Warrior + Monk = Berserker

Black Mage + White Mage = Necromancer

AST + Scholar = Time Mage

RDM + GNB + WAR = SOLDIER

Samurai + Ninja = Shinobi

You get the idea. I think how we get jobs now is just… too easy. Maybe this way it will spice it up a bit, not only will it add some replay ability to the game. But it will also feel more rewarding. Remember, if you make things too easy, there’s less of a “fulfillment” and “accomplishment” feeling.