1) STR does nothing for Ninja. DEX does nothing for Monk.
2) They already just use recolors of the same set.
3) Pre-ninja monk gear had dexterity added to it too.
It just feels kinda stupid that melee DPS items make up like 40% of the drop pool. Ideally they'd shove dragoon on a set with someone else as well, but they probably don't want to give them tank defense.
tank
healer
caster
ranger
ninja
dragoon
monk
This is lame.