I'd like to see more diverse effects of a job equipping similar types of weapons. For instance, a Warrior could equip both axes and warhammers. But, hammers would have a different effect on abilities than axes. Hammers could grant defensive bonuses on your abilities, while axes have an increase in DPS instead. Or if a Machinist uses a short-barreled gun, their cooldowns are shorter, compared to a Machinist who uses a long rifle of some sort could have an increase in DPS. Maybe a Black Mage who uses a wand has an increase in Thundercloud procs vs. a staff that might increase the length of Enochain.

But sticking to the topic, I'd like to see Whips potentially on a Blue Mage or Beastmaster job.