An anime original does a few things quite good, and K series does not disappoint.
Like sound. Awesome soundtrack just like the first season. The opening and ending may not be remarkable but are still good. The background soundtrack, voice acting etc are phenomenal.
Art and animation are also one of the few things that are benefits from being an original work. Although, the repeated cut scenes of special moves do get annoying.
Sadly, the fight scenes, even though they probably planned to make them very intense, are quite lacking. They add flashy moves like the spinning of swords or preparation of a special attack but to hide
the actual fights. Fast and odd camera angles to give the fight a sense of intensiveness.
There is a little bit of fanservice by the name of Awashima. Really, it seems like everything she does needs a jiggle of her assets or the way she falls must be an upskirt moment. Frankly, I am not opposed to fanservice but I think this anime could have done as good as it did without it.
There is some character development along with some back story revelations in the form of flashbacks but they still seem lacking a bit. I understand that is some work to be done by the novel writers.
The story takes a dive in the second season mainly because of the very vague logic and reason for the antagonists. I understand not every evil plan should be grand but for old experiences men to just go along a child's immaturity does not sit well.