I wasn't sure how Davies got anything less than red. First reaction on seeing the replay at the time was that it looked a certain red card. The neck roll getting just a penalty was baffling. CMK tried to justify it through some mitigation with another tackler involved making it appear worse, but I completely failed to see what he was seeing. It was as clear and obvious a neck roll as you'll see, and a far more reckless and cynical act than many head collisions that are given red without hesitation. All for protecting the head, but necks are pretty important too.