I wish this arc started with them joining Chouryuu instead of Kaion. Like, Chouryuu is just so much more interesting than Kaion, the latter is too much of a one-note villain. Kaion's still a lot better than Jirai though, I'll give him that.
I think the 50 Elites should be shaved down to 20 at the very least. They kinda dragged the story, and they didn't really live up to the hype.