One I came up with, I'd like for them to clean up Samurai's AoE rotation by getting rid of Fuga and have Mangetsu and Oka combo off one another. You do Oka to Mangetsu to generate a Getsu, the combo ends, then you can do Mangetsu to Oka to generate Ka, the combo ends. The potency would still be the same 100 > 160, but removes the awkward cone > radial on a speedy class, alongside it also having a radial oGCD.