I personally don't think the pacing is that fast. One person is going down each time (the loser of the trial), although I guess it might be too soon to confront Cannibal and find out who he is. Rather, I think Sakaki is doing it so we're learning a little bit about each character (Mao is an ordinary girl and also a manipulative brat and the Disguised Man is a gambler who has knowledge of Cannibal and Sumio/Matsurigi's ability). In its situation, I guess it's fine, especially when she can just discuss things afterwards. Either way, the rankings generally come out tomorrow, so hopefully Kirio's meeting will fair well.
Anyway, Akame displayed no knowledge on talents either, so I guess him and Mao don't have any abilities. On the other hand, it doesn't look like Cannibal's abilities have ever been shown to kill someone, so I'm sure Disguised and Matsurigi will be fine and their bones (talent and other stuff) are returned to them, especially if there's going to be an Act 3.