Ni Gorilla's arguable, but Asura was most definitely a significant power up. One attack in Asura turned Kaku's Rankyaku: Amane Dachi into mist, an attack that cut completely through the walls of the Tower of Justice and made everyone that witnessed it shit their pants.
Do we know if Zoro could have dealt with Amane Dachi at a higher diff using any of his other techniques, how about this very technique he used as his serious fight finisher in thriller bark against Ryuma?
Zoro didn't use asura against Oz or Kuma either when he was ultimately desperate, that leads me to believe his attacks are situational and Asura cannot be applied to all santoryu techniques, and that in fact santoryu is not always the best option anyway (as we see in this very chapter).
I am not shitting on Asura, I'm saying you are shitting on his base if you think it was that much of an improvement.
Luffy is using ryuo. Stop lying to yourselves.
what can u say about Zoro who didn't master shusui in thriller bark and had problem with it and his 108 pound canon missed oars or u should know it's oars who dodged and zoro attack reached him from far my geniuses and this is shusui who just Zoro used for the first time while this is Enma used by Zoro after training with it for 4 /5 days
Aye its never too late for him to also admit that Mihawk is bit better than just that. But its a good step in the right direction.

it seems shanks is stronger than kaido 