I am sorry if I intrude here, but I'd really like to say what I think about Gosho's style in creating mysteries and other thing that were discussed here *.*
First, I respect Chekhov MacGuffin: her theories are perfect, and even if something could be different from the actual solution, she still did a very great deduction job with her logical skills. But... I think there is a problem.
It was stated that her theories were wrong because "Gosho wouldn't put clues in such an obvious manner so that she could find them that easily"; in reality, I don't think Gosho exposed them carelessly: he actually hide them, but Chekhov was smart and found them. Where is the problem, then? Well... I don't think Gosho would change his writing style all of a sudden: if he writes this arc, he is writing it in the same way he wrote the previous ones, with little obvious difference (e.g. in this arc Conan already knows the "solution", when he wondered and suspected about other people's identity in other arcs, such as the Kir one). So, this arc cannot be too different from the arc we already read: and, among them, one is important... that is, the Vermouth one.
Imagine Chekhov today reading for the first time that arc, and trying to write down her theories here. If she follows a logical-based procedure, she would have found out that Jodie's surname (Santemillion) was a pun on "Sant-Emillion", an alcohol, that Jodie was referring to "someone who changed his appearance and now goes to school" when speaking about her target, and the phrase "A secret makes woman woman", common both to Vermouth and to Jodie. She is clever, and looking at these clues, she would say: "Jodie is obviously Vermouth, and the target she is referring to is Haibara, who shrunk down and now goes to school". But then, when we read the end of the arc... HEY, Jodie was just Jodie and the quiet Dr. Araide is the BO member Vermouth, who disguised as him.
Do you notice any similarity? I think it's the same here: she sure is clever, I cannot deny it. She found out a lot of clues that Okiya is Akai, but... we all did it when searching clues during the Vermouth arc:
and all of them were red herrings, since Jodie was NOT Vermouth. So, how do we know it is not the same thing here? In that arc it was too obvious Jodie was hinted to be Vermouth, and in fact she wasn't. Now it's too hinted that Okiya is Akai (well, during the case he was introduced in he was the Red Guy, and "Red" in Japanese is
"Akai"... if just some files after Akai's "death" someone called the "Akai Guy" appears, speaks about black, colours he "likes, but hates because it covers things of his life he wouldn't like to discover" and we see Conan letting him stay in his house in spite of his typical mistrust about everybody... isn't is too hinted that Okiya was Akai? Yes, it happened just when we knew about Bourbon existence, so that we could have thought he was him: and the fact Haibara reacted to him may have made us think like this: but then Conan gave the keys of his house to him, how could he be a BO member, in our minds? And that's it: I think it's too obvious not because I read the theories... but because it seems like the Vermouth arc: I couldn't notice clues in that arc, and didn't notice clues in this arc either until I read the theories: but even now, I think it's not a coincidence. Even Sera, who's thought to be Akai's sister... Gosho already used this during the Kir arc, where we had siblings with identical eyes... and Gosho even said during an interview "Maybe she's the sister of a mayor character"!
I conclude saying that it's true that during the Vermouth arc there were clues that made us understand that Jodie was not Vermouth, while the Woman in Black was disguised as Dr. Araide. But it's also true that, while the red herrings were evident, obvious and manifest, this "real" clues were so hidden that it was really difficult to notice them (e.g. the fact that Jodie's photos were pictures of Vermouth's ones because of the irregulars bords). And the same here in the Bourbon arc: how do we know that Gosho didn't put very-well-hidden clues to hint that things are not like we think? It could be, and maybe Chekhov did not see them. It could happen, and not because she's stupid or else. She's very very clever, but Gosho may be even smarter.
So, the
rules of the game haven't changed at all, in my opinion

Gosho played with us since the Vermouth arc, making us think things he would "destroy" during the resolution case. Red herrings were always present... before and now. For example, I perfectly agree with the theory about Akai's way of faking death: Gosho never clearly hinted that things could have be like that, the trick with the two phones is clever since the last time we saw Conan clearly using two phones in a BO case was 100 cases before during Black Impact, in the car with Jodie... and it's a real case in which hints are hidden and the clever reader find them in order to reach the truth. Scar Akai=Bourbon might be OK as well... but other things, like OKiya=Akai and Sera=Akai's sister appears to me as over-hinted by Gosho himself.
Just my opinion, obviously ^^
