Maybe not with the killer's identity, although I was pretty sure it was Cam. But it got really annoying, how everytime they start to flesh out some side characters, they died during the same episode. Or like with Ian, the next episode.
I was re-watching the show on Netflix. My niece and nephew were watching with me and they figured out who the killer was by the second episode, I hadn't noticed before, but at one point the camera goes in for a close up of the Executioner and you can see the color of his eyes. I was surprised I hadn't noticed before, the eyes and the build, it was pretty obvious in hindsight.
-When you're jaded enough everything can seem like a cliche-
Yeah I suspected it was him pretty early on...and I noticed the killer's eyes in the scene where grandma gets killed, so it knocked out nearly all other suspects.