I usually don't trust manga readers, they always find something to complain about, but they're right on this one.
Season two fails to keep you on your toes like season one, everything is incredibly predictable. Deus ex machina is repeatedly used, as of episode 8 we've had four. The pacing is all over the place, they clearly rushed the first few episodes to get to the anime original content. There's a major plot twist about half way through which was incredibly poorly revealed (and pretty obvious is you were paying attention to season one).
The show seems to think it's posing interesting moral questions, questions such as "are genocide and terrorism bad", really makes you think. One character literally says "I love killing demons and eating their meat!", wow, real subtle.
There is an interesting conflict being set up, but it can’t be adequately explored in two episodes, so hold out hope for season three i guess, not that most people will care at that point.
Edit: Holy shit, it ended?! What the fuck? The last two episodes were the most embarrassing failure I've ever witnessed in anime.