Enlighten me on Zoro’s “better” feats of CoO if you may. If he had better CoO, he should have been the one to dive into ice lake to find Kinemon’s torso, yet it was Sanji in Nami’s body to do so. Sanji did it in a body with much much much less physical stats and probably quite low Haki pool. If their CoO levels were close to each other, or if Zoro’s was stronger from the get-go, the one who should have dived into the lake should have been him, after all, it would be a much safer bet.