The problem with this is that Oda doesn't know how to properly display how bad ass they are because he didn't set up the villains better. DBZ did it right, show the ginyuu force destroy the other fighters including Vegita who was pretty strong up till then to really emphasize how strong the enemies were so that when Goku came and one shot Recume, it was a big deal. Zoro one shot Hodi, good, because Hodi is a scrub so he should. Doesn't emphasize how strong Zoro actually is because none of us respect Hodi in the first place. How many posts have we had talking about how weak Hodi is, that he needs drugs to have any sort of power, etc.? You need some kind of build up for the enemies, make them look badass and strong before the protagonists crush them if you really want to display the protag's new found strength.