Do you really believe that Zoro after fighting and beating Kaido with others will be weaker than fucking Vista?
Vista is not dangerous to Post Wano version.
Mihawk only rated him because he wanted a chance to duel with someone who knows how to wield a sword.
First of all,
Zoro will participate in fighting Kaido... assuming he will take down Kaido is SOOO pre-mature considering the build up for Luffy.... and if you're just gonna give me the "Kaido must die, Luffy doesn't kill people" I happen to be a person who believes Kaido will NOT die in this war... reason simply is that is Kaido's wish.... Luffy BREAKS everyones wish...
Secondly, it's too soon to tell what roles Zoro will be in the fight..... hell, he can be the person to kill Kaido... who knows... I'm not against it.... BUT, it's too soon for you to say it AS A FACT that Zoro will be the guy to beat Kaido and then say he's by default strongr than Vista....
Sure, if that happens, I will agree, he will be stronger... but I personally have different vision for what Zoro's role will be... as simple as that... and as scenario differ, and roles differ, the FEATS will differ too....
And my scenario simply will make Zoro > King..... for MANY people, they consider that by default stronger than Vista because King is YC1.... HOWEVER, as I stated, I simply treat WB commanders differently than Beast Commanders and Sweet General from BM Pirates... I generally have WB commanders >>>> than them
And I simply put Vista > King for my own reasons
Which is the same level I see Zoro on after Wano... Higher than King...
again, Vista is not being treated as a YC5 by me... I scale him differently by the mere fact that I rank him STRONGER than Jozu who's WB 3rd division commander