I am quite pleased with this chapter. Not sure why people are not satisfied with it. Delusional Kaido fans can't accept that Oden was an formidable enemy for Kaido. But he was.
Underhanded tricks, spies, 100:1 power ratio, yet the eleven samurai came close to overthrowing Kaido/Orochi.
The ultimate truth is this: Kaido is strong. But he is not invincible. And KAIDO IS NOT IN THE SAME LEAGUE AS WB AND ROGER.
Of course, we Admiral fans must exercise caution. Kaido will get some moments of glory now. So, we can't make premature statements. However, I feel safe in saying that KAIDO IS NOT, WAS NOT, AND WILL NOT BE THE STRONGEST ANTAGONIST IN OP.
I am not sure who the traitor is. But Shinobu doesn't feel like a traitor to me. It could be one of the time-traveling scabbards. So, either KIKU or KANJURO is my likely suspects.