It was a nerf this entire time. We didn't know explicitly how it'll make him stronger until now, but before this moment he's been trying to figure out how to even use Enma effectively and not die. All this time he regulated his haki. All of this is in this current chapter. Sorry that Zoro just been this strong the entire timeskip unlike Luffy who needed a 1000 asspulls only to get oneshotted by Kaido and get 1000 more in this arc alone.
Yeah your gonna have to explain to me how someone who could cut Kaido would have problems cutting a bird cage by the likes of doflamingo. Or to struggle fighting someone like Hawkins. Yet he's had this power this entire time.
Lets see what powerups Luffy and Zoro have had this far shall we:
Luffy:
Advanced Armament
Advanced Conqueror's
Zoro:
Enma
Advanced Conqueror's
And before you tell me Enma isn't a powerup:
Don't forget it's written in the manga.
