Unpopular opinion, I actually really don't like S4's artstyle. Especially Kotori, Kurumi and Shido. While I can somewhat get behind the other characters, the eyes of all of them were way better in the rest of the serires than in S4. While I hear this series has been through a lot over the years going from studio to studio, it always annoys me that they change the artstyle. I don't know if this studio follows the Original LN more or what, haven't read it, maybe I should though to get the full picture. It's the same thing with the last season of High School DxD,the artsyle if SO FREAKING BAD compared to the other seasons. The last season is way more round, baby faces galore, and looks like it has been fitted to kids ages 10 and down. It's SO bad! Same with Sora no Otoshimono's last movie, you can't even recognise the characters.

AND WHAT THE HELL HAPPENED TO MANA?!?!