Wow, Takemoto Yasuhiro (Director of Hyouka) is definitely not someone who I can trust, at least according to his recent interview.
Long story short, I will talk about the part that is most important. He said "Mystery will NOT be the main thing of the story, and bitterness between characters from the club will be main".
You know what? What he said is basically this 'lol this is my first time directing mystery show!'. It also mean that he is saying something that we expected to be 'sweet' to be 'bitter'. They showed us something looks delicious and suddenly, person who made it says 'it is not delicious'. He is either too honest, incompetent, naive or just incredibly stupid.
Now, the reason he is definitely not a good director is in fact he has no idea what 'mystery' is as a genre. General understanding 'mystery genre' already INCLUDES bitterness between characters. DUH. He is definitely not understanding how this genre should be handled. Basically, this interview by him is just suicidal.
Gee... Kyo-ani, get some better directors.