My thoughts on the situation Olin and Kid.
Oda set up a scenario to get some rabbits out of the hat at once.
In this particular situation, he is creating his Big Mom // O-lin pattern duality plot.
> Setting the stage for Ulti and Pageone vs Nami and Usopp.
> At the same time, he is creating a plot for Ulti and Pageone to join Kid's crew (this theory has always been very reasonable), making Kid save them, and at the same time setting the stage for a Big Mom vs Kid fight in 1vs1