The problem is, you care way too much about a fictional character and his portrayal at all. This also goes for King. Nothing I can say but wait, as I've always said for literally every argument I've made.
My thought process has nothing to even do with portrayal. It has to do with dialogue and intent on the story. Zoro has made no mention to go back to Kaido, and thus I have zero reason to believe he will. In fact I have more reason to believe he won't since he's stated to leave Kaido to Luffy and was the person who suggested to go the Performance Floor anyway.
I could care less if Zoro 1 shots King for "portrayal". My point is that the story at this point has him lined up to be a player on the performance floor, not the rooftop