This is probably going to sound silly especially after all this time but how about providing an offhand equipment for the jobs that don't have a shield or dual-wield? Like maybe an amplifier for ol' black mage here, and maybe a whip or somesuch for beastmaster? Because unless you actually plan on letting these jobs dual-wield or use a shield they kinda are at a disadvantage when they have to fight ya know? Especially black mage, who for some very odd reason can use swords, daggers AND scythes but not a shield.