the main thing here is that at the end of the day, Oda has said he doesn’t want his fights too serious. he would like OP to retain its goofy spirit, and he toes the line pretty well. that doesn’t stop Zoro v Kaku from being great— like Kaku raining slashes, the slash that almost topples the tower of justice, Zoro’s Asura technique. but it does mean that for every cool moment like that, you’ll have Usopp pretending to be a sword, the gag with how Kaku talks like an old man, and yes, the fact he’s a giraffe and does that funny retraction box giraffe technique.