I have to say that this chapter did a job of letting us know why Kaido wants to create a "world of mayhem" like he calls it, so that's one of his motivations. We still have quite a bit to cover for his character though, this flashback was good for this situation where we see what kind of world he and Luffy want. But it's definitely not the end.
Fascinating Chapter, I think that last page hints to the fact that even if Kaido isn't "down" in a sense, he's resigned to his fate that he's supposed to lose to Joyboy/Luffy. I hope next chapter we delve a little more into Kaido's background and maybe get a blurb with him smiling that he has a purpose.
Like I said mate, I never taked about Kaido being good I just put foward an idea where Kaido joins the fight against the celestials and their lapdogs because he has brought that up multiple times. It doesn't mean he gets reedemed, its that He'll fight the WG.