The Behind of the Nihon Review posted a usual season summary, where a couple of grafs caught my eye. In particuar, the second opinion by a staff blogger Reckoner:

Euphonium’s second season has yet to truly justify its own existence. Now that Kumiko and the concert band have made it to nationals, a lot of steam has come out of the show’s wheels. That obsessive and intense focus the band had in accomplishing their musical aspirations has taken a backseat to some generic feeling drama and nonsensical yuri pandering. Kyoto Animation knows exactly what kind of audience they are trying to titillate still with Kumiko and Reina’s relationship, but at this point it is starting to drag down the characterization and hence the show.

LOL, I knew it!