Imagine this scenario for Wano.
Wano is full of powerful samurai. Some of them are actually loyal to Orochi.
There's this "guard dog", who was considered the BEST swordsman in Wano. Oda could make so that this samurai could even be at Mihawk's level, but due to Wano's isolation, could never go for the title of "WSS".
He's extremely dedicated to the "way of the sword".
Now imagine Kyoshiro is this character. No "Denjiro" BS. Zoro confronts him during Yasuie's execution, creating this mutual interest in their confrontation later on.
Orochi gets beheaded, but Kyoshiro and Fukurokujo would do that sneaky thing and secure him. Once he's running around the castle, Zoro confronts them (no Marco throwing him to the roof BS). Zoro wants to kill Orochi for what he did to Yasuie, and also fight Kyoshiro.
Then begins the fight against the man who wants to be the WSS vs Wano's strongest samurai.
Now, what did we get?
Stalled plot on the roof.
Stalled plot with Orochi's "death".
But somehow I hear/read people saying Wano is "zoro's arc".
People standards really are low apparently. As long as Zoro gets his checklist, doesn't matter if the story is garbage for it.