Not so into this yamato plot..like confusing the powerlevel..
Yamato is kaido daughter (Like katakuri as big mom son)..now she's been some chapter stalling kaido alone, While luffy cannot do and lose..
Let say kaido stalled due to father and daughter state, making kaido don't fight full power and do not want to beat her right away..
If yes, this doesn't make sense..supposesly a yonkou need to quickly control the situation.. Especially now his army is in a mess (losing almost 40% in terms of number)..
Its not i dislike yamato.. It just like throwing a new character (started in middle of onigashima war and make it strong & suddenly pivotal).. Plot wise unfair for the other char such as, scabbard oden build up, kid and supernova power improvement all over the years, shown as yamato above jinbe that is more senior and well known for years as strong shichibukai (since yamato meet ace moment)..