What I want for NIN is some sets to already be asymmetrical pairs. So far every single set has been a pair of twin blades, but would it kill them for a few sets to be different? Like Tsukiyomi's Daggers could be one white dagger and one black dagger, or some leveling or expert dungeon could be a Cinquedea+Main Gauche, or maybe a kodachi+kunai? They could do the same thing for some MNK weapons. Make a few sets where one fist has spikes and the other fist has katar blade on it.