So oda let zoro playing with king(pica 2.0) longer to made a plot for king backstory or something like that.well oda can't Let the strongest at onigashima right now running around cause the arc could be less tension(due to zoro finish this arc by one shot kaido).Enma is miles better than gifted power up from daddy(zoro need to train and tame enma while fighting 2 yonko but okama runji get all strength he need from his daddy no need to train).btw sanji fans use to say sanji doesn't need to train to get strong (it is true why sanji need to train if his daddy could give what sanji need).his strength since east blue is from his daddy after all.cyborg 2.0