Ao no Exorcist is one of those show with interesting plot but goes downhill as the series progresses.
Story 6 - The story to be honest is not interesting at all, unique plot idea but the setup and build up are so generic, the story is predictable and the executions were kind of sloppy. It holds down the true idea of the main plot. I seems like A-1 didn't put an effort on this series. Overall kind of fair story yet with rough direction and very cliched setup ( predictable ).
Art 4 - After watching the 1st episode and the Opening at the end, it made me think that this show had a potential. The episode 1 is very well executed with good cinematography and heavily filtered by blue and the 2D frame animation cuts were so clean that made the series high quality. But after that the series went downhill, with very stiff animation and that very disgusting weird cgi on Episode 6 made me puke aaaaAAAAaaaaAAAA. Overall very bad quality for the series ( very disappointing )
Sound 8 - Sound is great to be expected having Uverworld on their main opening theme. Soundtracks are good too, but not memorable in my opinion.
Characters 6 - Characters are kind of decent I guess, for me it seems the cast are off, It just doesn't help and to be honest makes the plot worse. Cringy interactions and sometimes very sloppy executions when it comes to major scenes.
Enjoyment - 7
Overall 6 / 10 - I mean Ao no Exorcist is really not that bad but in my opinion, the series didn't work well and the potential was wasted. This Arc is very good but A-1 Pictures failed to show how good it is when adapted. ( stiff animation, sloppy executions, cringy interactions, and a very generic setup that is obviously predictable. I prefer more the Original ending of the 1st season than this one.
