I'd like to see them remove the pets and replace them with turret-style versions. Make Garuda attack your target with AoE's, make Ifrit use Single Target attacks, and turn Titan into a pet that buffs the defenses of anyone around him at the cost of not attacking.

After that, allow us to equip the "essence" of a primal in our secondary slot. Make Enkindle summon that primal to do a toned down version of their ultimate, and have each ultimate have differing effects.

Everything else could stay mostly the same. Pet actions that were once tied to our pets can become normal actions. Adjust our dps to account for some added utility, and make Bahamut remain in the same place as the turret pet he replaced. Also, Auto-upgrade Ruin>Ruin III. Can keep the Ruin IV as a proc.

If they did the above, or even just the pet-turret changes, I think we'd lose a LOT of the clunkiness this job currently has.