I'm really trying to like this weapon but i just can't. All the good things it has about it get completely diminished by it's downside: terrible AR.
All good fast weapons (Including Dark Sword, Lothric Straight Sword, CCS, Follower's Saber) at quality build of 40/40 have AR somewhere between 410 and 440.
At the current meta levels of SL120 which average flat damage reduction being somewhere between 140-160 that means somewhere between 250 (worst case) to 290 (best case) damage per hit.
While the poor Storm Sword deals only 370-375 at 40/40 which translates to damage between 190 (worst case) and 230 (best case).
That's just garbage. That's literally a good 20-30% damage difference. And Storm Sword has no redeeming qualities to it. No increased crit damage, no special unique effects. Only fashion and mediocre weapon art that is:
A) Has no hyperarmor.
B) Extremely hard to land (landing an R2 hit with increased stagger almost guarantees a successful weapon art, but then again what idiot will get caught by R2?)
C) The knockback has no practical use in duels. Nor it does in 90% of situations. Gives you time to chug that estus, at best. Not to mention it's useless against enemies with good poise.
I wish Frommy would buff the poor thing. Or nerf everything else to make it on-par with it. Whatever drives their boat...