The season hasn't ended yet, but I can see where it's heading so I'm just going to write a short review on it.
Story 6/10: There are few new elements in the story. A war against bugs isn't a new concept. It resembles too much of "Attack on Titan". I can predict almost everything. Many suspend moments are forceful and unrealistic. *Spoiler* Characters/monsters are bound by a ranking system that isn’t reinforced by anything. Winning or losing (fast or slow) is all depended on the mood.
Art 8/10: Characters look great. Monsters however are not. They are mostly clumps of meat with eyes (lacking creativity).
Sound 8/10: Nothing sounds wrong, but also nothing sounds great either. Again, theme music is very similar to “Attack on Titan”.
Character 6/10: There is a big flaw; the power scale is all wrong. As a result, the main character doesn’t really grow as the story progresses. I got frustrated because he got beaten by random weak opponents to create suspend moments. The main character is friend/family of many powerful figures somehow afraid of random bad people. He is a “part-time” badass ?!?
Enjoyment 7/10: If I haven’t watched other animes, I would have enjoyed it more. It just has too many “dumb” frustrated scenarios, which taken away the joys.
Overall 7/10: It’s an ok anime. Not quite on par with other animes in this season.