Oda is a such a funny writer especially when writing fights.
Previously Omen + Gram Sommers easily overpower Zoro KOH strongest move (he used so far)
Which give an idea that Buff Sommers is a serious challenge to Zoro and certainly above Zoro previously beaten opponent that he beat with the same move aka King.
Now Zoro casually blitz, cut him up and clown him again.
Buff Sommers turn into pre-buff bummers, the regen merchant all of a sudden.
And it's the same Zoro he overpowers 5 minutes ago without gaining power up yet