User blog comment:Lasaro Ginjou/Chopper's power growth/@comment-24850639-20171004202401/@comment-5536072-20171004235645

Well, let's put it this way. Nami showed some awesome moves in whole cake arc. Robin showed that her reflexes got much better in dressrosa plus the ability to sprout limbs in the air and not on solid surface. Sanji is only now showing his improvement in cooking, although I agree that he has not shown enough in terms of power. Usopp developed Kenbunshoku and showed that even without it he would have made the shot in Dresrosa arc. Chopper has not shown anything new however since fishman island.

The easiest would be the first theory with the new Rumble Ball. I agree and hope about Electro. The Seimei Kikan will be difficult because it is not just science. The Haki I believe will definitely happen.