Honestly. It didn't.
But the very character we are discussing said that he was gonna get stronger once he mastered that sword.
Didn't he?
It was not a SBS crap, not a databook shit. It was the own character. Inside the story, that explicitly said it.
I know you people like to play fantasy zoro-land in your heads, but please, try to actually graps the concepts of what a power up is, and what forms it can take, before spitting this "power up is this because I want it to be only this" bullshit, will you?
:cheers:
Peace, homie.