What I want:
* A more defined role for RDM. Any uniqueness has been eroded away since the level cap was raised from 75 to 99, either through subjob RDM or giving other jobs formerly unique RDM spells. Devastating enfeebles, tier III enspells, increase staff skill from H to B+, native sword-staff dualwielding, anything crazy enough to give the job it's unique feel back.
* Upgrade PUP's Harlequin automaton. It's the first automaton you get, but it scales poorly compared to all other automatons. For example, give the Harlequin Head +1 rank in melee, ranged and magic at level 40+, make it attack with both hands like a monk (1 hit/hand), give it one or two unique weaponskills to set it apart from the mage frames with the same weaponskills, etc.
* Give players reasons NOT to level a job from 30 to 99 in a few hours just by leeching exp in abyssea.