User blog comment:Kaido King of the Beasts/Chapter 879: Mirror Battle in Mirro-World/@comment-27930128-20170922112820/@comment-75.133.94.198-20170923000713

Well with Doffy it was all about showing the limitation, otherwise if he overcame it immediately it would leave no suspense. Luffy needs to find things that only he can do, either because of the DF or because he is crazy Luffy. I expect Luffy to start learning from some of what Katakuri is already teaching him, such as a new type of gatling. This fight points more and more to Luffy just learning from it in order to gain that strength to protect his crew. Each of the recent fights for Luffy has been against people who continue to push what a paramecia can do, and Luffy needs to find where his DF limits really reside.