Really feeling sorry for Yamato...Her own father placed exploding cuffs, thrashed her whenever he met her...... I know Kaido is disappointed that she respects Oden more than him and maybe he wants to gain her respect by waging a war against the whole world and winning it.....
Best thing about this exploding cuffs is that everyone dissed Sanji at the time saying all kinds of shit about
"He is trash, he can't use armament to block exploding, he cannot tear it off easily"
When basically for 2nd time this arc, Oda shows that it bypasses the regular armament shit, where Luffy had trouble before advanced haki, even Hyo has trouble cause his advanced armament is 2nd stage, not from inside out, 3rd stage
Yamato (daughter of Kaido) very strong, and used to have fights with Ace, still with same problem
Thank you Oda
Kinda late to justify it, but still, it removes hella weight off of Sanji during WCI