I didn't like this episode quite as much as the two most recent ones, but it was still a very good episode.
I'm starting to think that Hyouka is ironically at its best when it's
not focusing on mysteries.
For me, the highlights of this episode were:
1. Mayaka's continued issues with the Manga Society From Hell.
Man, those Vocaloid cosplayers are hilariously catty and nasty.
2. "I have expectations!"
Ha ha ha ha! Chitanda failing so spectacularly at Irisu's style of asking for help was comedy gold.
3. Admittedly, that scene that rulfo put up as a gif. That was pretty funny, I have to admit.
So of the three, two had nothing to do with the mystery, and the third one is funny mostly because it's an update of Chitanda's comedy routine.
And the mystery itself is so random and ultimately lowkey that it's hard to get into. Hyouka makes up for it by scattering several nice comedy bits and character development bits throughout, though.
I'm honestly mostly interested in seeing how Mayaka works out these issues with the Manga Society From Hell.
8/10 for Episode 15 of Hyouka.