With so many jobs now having important JAs or JTs added since Artifact Armor was created, in the early levels, I'd like to see a reevaluation of the armor first. The same should've been done for Relic Armor too in my opinion.
Samurai comes to mind immediately since Hasso, Seigan, and Sekkanoki were all added after the creation of AF Armor. Then there's also PUP (Deus Ex Automata and Resist Amnesia), NIN (Yonin and Innin), WHM (Tranquil Heart, Divine Veil, Divine Benison, Afflatus Solace and Afflatus Misery), DRG (Conserve TP), BLM (Magic Burst Bonus and Elemental Celerity), RDM (Composure and Tranquil Heart), PLD (Shield Mastery and Auto Refresh), DRK (Stalwart Soul and Occult Acumen), BST (Resist Amnesia), BRD (Pianissimo), RNG (Velocity Shot and Dead Aim), SMN (Elemental Siphon), COR (Rapid Shot and Resist Amnesia), SCH (Tranquil Heart and soon, the Helix spells will be available early enough).
The other jobs that didn't get low level changes could use a reevaluation as well, but you get the idea.