That Asura-attack was Zoro's strongest attack post TS so I'm not much surprised by its feat. If it hadn't got such praise from WSC, he might have just given up on becoming WSS. Zoro having COC was pretty much given.
The only thing that's noteworthy here is how does CoC connect with Zoro's Asura..?? Oda first set the variations of CoO, then CoA and now he's on to CoC.