Kid and Law beating a yonko and not getting immediatly 1 shot like yc1 zoro >>>>>>
Yamato ACoC and Zoan >>>>>
Kaido and Big Mom together using combo attack couldn't oneshot Zoro.

Kid and Law only beat BM because of help from Kaido's bombs. The most they could do without it was knock BM off the island. King knocked BM off her ship and BM had her crew backing her up at the time.

Yamato is closer to rooftop Zoro than ACoC Zoro.
 
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