Interesting concept, seems with the demons/monsters coming out it caused humans to adapt and take on new forms. While we seem to be following a person who is still human, we are unsure if the girl has something special to her. Odds are there is, it'll be interesting to see how it progresses.
Seems the main character can use jujitsu which is pretty cool, it does make for a lot of neat looking scenes since getting those angles and feel just right is rather tricky. Have to put a heavy focus on the bodies of the people as well as placement and position of the people in the bought, if it continues down that path it will make for an interesting miniseries.
If anything comes off as Miura just wanted to be able to tell a quick story from start to finish just for something new, and maybe to even have some fun with unique character designs, we have the insect tribe, so if that keeps up we might see bird people, reptile people, plants, fish etc etc, it will make for some good images.