I honestly want to see more "cast times" on melee classes. Needing to "charge" a move before unleashing it can make big attacks feel juicier while also adding an element of tactical timing to its use. It boggles my mind that WAR doesn't have even a single move like this to make their heavy axe feel that much heavier and impactful.
I do think that the "charge up" for Iaijutsu feels extremely good. The anticipation of unsheathing that blade is so camp and really feels in-line with the vibe of Samurai.