Holy knight

[Kabooa]

I can and will use that argument as it is part of the whole that is world building. Yes, Dark Knight animations "work" with any object you place in their hands. That doesn't mean it won't look terrible, break lore or just make no sense. You're essentially telling me a MNK will look just as fine using a spear with their animations as their fists; that is the difference of placing a shortsword in the hands of a Dark Knight, whose animations are built around a claymore.

Except they're more appropriate with the PVP Glamour weapon, the beatstick. Seriously. The Beatstick makes it seem like the Dark Knight -should- have been a two handed club job, because the consideration of weight and momentum given to the animations fits a crushing weapon far better. When the sword is big enough, it's not really about it being a sword anymore.

Put a giant metal stick in Guts's hand, and he'll use it exactly like his sword, it'll just leave a bigger mess behind.

[JunseiKei]

Except they're more appropriate with the PVP Glamour weapon, the beatstick. Seriously. The Beatstick makes it seem like the Dark Knight -should- have been a two handed club job, because the consideration of weight and momentum given to the animations fits a crushing weapon far better. When the sword is big enough, it's not really about it being a sword anymore.

Put a giant metal stick in Guts's hand, and he'll use it exactly like his sword, it'll just leave a bigger mess behind.

The PvP club? You mean the onii club, Kanabō? This is why I said at least part of this is grounded in reality - a two-handed club/blunt weapon doesn't exist in reality. At least, not in that way. The closest equivalent is a bo or rod. After that, you find maces or possibly the Macuahuitl, which is a PLD arm already (and single handed). It's also said that Dark Knight did take inspiration from Berserk.

Speaking of Berserk (which is why I'm guessing you brought up Guts)...

...With Guts though, he doesn't like normal swords. He actively turns down smaller swords when offered (happened once or twice). He always uses a claymore. Also, you're not getting a much bigger sword than Dragonslayer.

(In my opinion, none of the moves would fit with a club - you don't use a blunt weapon the same way as a slashing weapon, but you may use it similarly to a piercing one. That's probably why DRG got the Eastern Journey Battle Staff item.)