I'd really like if more classic outfits from the franchise came out as glamours. Perhaps they could make a event for each class. Hopefully without all the grindy crap though.

White Mage: The actual classic robe, which is the one that the minion of light wears.
Black Mage: Vivi's outfit.
Dark Knight: Dark Knight Cecils armor. We have some of his other stuff, so it'd be cool.
Summoner: Yuna, Rydia, or Princess Garnets outfit.
Machinist: Rikkus outfit.
Ninja: We already have Shadows outfit as Ninja job gear, so I would give this one to Yufie. Another good option would be Locke Cole.
Monk: Sabin's garb.
Dragoon: Kain Highwinds outfit.
Warrior: Adelbert Steiner
Paladin: Cecil Harveys Paladin garb.
Astrologian: This is a tricky one, but I think Ace from Final Fantasy type 0 might fit.


possible future classes:
Red Mage: Terra, or Celes outfit.
Blue Mage: Strago's outfit.
Samurai: Cyans outfit.


Maybe the lore could be about certain legendary heroes, that are said to have once visited Eorzea, or a traveler that was said to have gone to fifteen different worlds.