No, I haven't.
But I can't see why anyone would see a disconnect between what happened to JB and her being placed in a blanket by a parent. Lest we forget, the idea was not to kill her, but that she was already dead and to save one'self. The blanket came afterward, a means of physical cover-up to aid the person's psyche, or has anyone else noticed that the note makes no mention of her name. A lot of people have made issue of that, but those same people never seem to notice that the parents never or almost never refer to her by name in interviews, either! See, you can't argue one thing or another in this case without considering the "big picture." Those patterns get my "little man" doing somersaults in my stomach. And I've learned to trust the "little man." To see her and use her name would make it too "real," you know? In the killer's mind, it was "someone else." That involves a lot of psychological nuance, but my point is made, I think.
And to answer Holdon's question as to whether the cord was meant to kill her or just a prop, the answer is, both! Actually, I should categorize that. I guess Norm Early said it best. He said that if you are going to stage a strangulation, you don't want the coroner to come back and say that it could not have killed the person, so you keep pulling it deeper. Make sense, or am I just typing to myself?
Just spitballing, but with reservations.