Sega nerfed several weapons with terrible super specials in GC. Berdysh went from Charge -> useless energy wave, and Soul Banish went from Berserk -> useless Megid. They also nerfed Lavis Cannon's waves to drain HP and only deal special damage, rather than deal heavy damage (with PB building) for free. Psycho Wand went from simply cutting your TP cost in half to sucking the full TP cost from your HP (although at least it got Technique boosts to compensate for the nerf).
On the other hand, several super specials only suck because Sega didn't set the ELT on Ultimate enemies reasonably. I fixed the resistances on Ult for V2, and as a result Grants, Photon Blasts, and Divine Punishement all became useful. Theoretically Berdysh could be fixed the same way, assuming its base power is reasonable (but if it does terrible damage even against an enemy with 0 ELT, then there's not much hope of fixing it).
Sega seemed to think that cool-looking specials were more important than useful ones, but Berdysh isn't that good on V2, anyway. Its default ATP is so low that it barely does any damage without Charge, so you'd be better off using an Imperial Pick with 40% to get the same damage without spending any Meseta.