It's a bold move that they take. It follows the events in End of Watch so I don’t mean that they are altering the story too much but by moving into this straight from the first season and skipping Finders Keepers (that built up to this moment) we end up in the supernatural so much faster and some viewers that thought the show was supposed to be a crime show with limited supernatural involvement might be turned away. I hope though that they are giving it a chance because I think it works great. It will be a challenge to go through the entire season like that but hopefully they can make it work.
We also see Jerome’s little sister Barbara who (at least in the books) will play a somewhat big part in the upcoming events. I’m also looking forward to seeing more of Holly. So far, she’s been taking a backseat but I’m sure that will change.