I honestly don't know what the naysayers really have against this episode. It was the same Criminal Minds we've loved for years. I read the gripes and they honestly feel so phony that I can't imagine any of these reviewers have ever been fans of the show. At least they must've been given a really big personal beef with the show.
This episode was good. We had a scary unsub. It wasn't THAT gory. We had a lot about the team, and some good family scenes at the end. We had some good characters development, and even some profiling. I honestly don't know what else people expect from an episode of a show that they've gotten before.
So don't let the naysayers deter you. This was a good episode, well worth the week wait. Strong episode all around.