So Luffy calling an attack from two Yonkou dangerous means its the strongest attack in the series? No thats not the case. You see base Luffy with AdvCoC >>>>> G4 Luffy with no CoC and you call a Kaidou's indirect wind of non-AdvCoC attack which Zoro blocked a little fraction of for 1 sec, the strongest attack in the series? Its so unfair to say i'm the one who downplays it when i'm just saying my opinion.
BM saying its impressive is not extremely surprised. BM became speechless due to G4 Luffy gattling Kaidou, that was BM being extremely surprised. Sanji is nerfed and weakened since he was beaten by 2 YCs for a few chapters, while Zoro was healed after the medicine senzu bean. They hit their targets at the same time, even if it's clear that Sanji is faster due to him being weakened, i'm not saying fresh Sanji as supermassively faster than Zoro or that Sanji is the fastest man in Wano. So its not me downplaying Zoro i guess, but you overestimated his feats imo.