I always thought it would be cool if they were to add ultimates to weapons like they do with sprites, for example they would give you a choice when a choice while heating to choose how your weapon works and they could hold a event for knights to help redesign weapon charges.
for example these are my ideas:
Divine avenger: instead of spawning 3 swords it could form one giant glowing sword swipe that would cause good damage
Grand faust: it would still have a long charge time but instead of shooting out a sword it would spawn 3 curse knights to help fight with you.
Leviathan blade: the charge attack would make the sword glow and increase attack speed and power for a short time.
Would be cool if they could just give us different stances and 3 different modes to use our charge attacks for every gear. But yeah, i don;t know how they feel about it. Anyway, whole new charge attacks graphic design are used for new weapons and i doubt they would create it for an already existing weapon. But good effort though in thinking up new charge attacks.