I think what is missing from the Jobs is all jobs not having unique non-combat traits or used for combat that make them special, like say for example its worked like this:
Ninja is given a unique ability to steal items from monsters, other than that I think Ninja is good.
Dragoon is given a passive ability to jump higher in any zone, might be good for those sightseeing stuff that requires a lot of practice. It would be kind of cool though if Dragoon was given the ability to turn into some kind of Dragon-Man for some seconds that buffs your stats temporarily.
Monk able to Jump-dash to locations really fast (Dragonball Z style)
Red Mage allowed to transfer Aether to BLM or WHM to replenish their Aether (though this costs all of the Red Mage's Magic), might be good for Savage Raiders that are in a dire bind though at the cost of DPS loss.
Gunbreaker allowed to switch to Physical Ranged with its own moveset to use their Gunblades from a distance, it would make it a even more unique Tank and also make it the first Hybrid Physical-Ranged Tank of FFXIV.
Warrior allowed a new set of Weapons called War Hammers that allows different variations of Warrior Combat Skills that Giant Axe Weapons cannot do, I know some War Hammers already exist in the game, but giving Warriors more Identity here would definitely help.
Dark Knight's Esteem ability should be a permanent effect in combat, but it ends up doing half the damage of what you can do to balance it out without risking of being Overpowered and unbalanced with the rest of the tanks.
Machinist, same thing with the Dark Knight, let the Robot Guy be a permanent effect.
White Mage, allow White Mages to cast a LB3 version of Holy as a alternative to the complete revival spell in case its not needed.
Astrologian, allow ASTs to cast a LB3 version of the Lord of Crowns & Lady of Crowns to apply to all members of the party for 10-15 seconds as a alternative to the All Revival LB3.
Scholar, allow SCHs to cast a LB3 spell that creates the ultimate Fairy Summon Spell that hits all enemies, and applies beneficial status effects for the party for maybe 6-7 or so seconds.
Summoner, I think its perfect as it is honestly, no comment.
Bard, perfect, no comment, it already has really good identity.
Paladin, The staple job of the Warrior of Light, I think what it needs is a alternative LB3 where it does a Signature FF1 Warrior of Light Style Attack (just to note I think all tanks need their own LB3 Attack as well).
Sage, should be given a alternative LB3 that has a unique shielding ability similar to a tank, not as strong as a tank's LB3, but comes with some beneficial effects?
Black Mage, its fine as it is I think, but I think it should not be forced to cast magic while standing still considering the complexity of Raids lately (just my opinion).