I tend to agree. The revising that I refer to tho, was perhaps where they would leave JBR. Perhaps they had initially wanted to lay her in her bed....nope, too cosy for a dangerous stranger to be responsible....later came the note - not gory enough (there are missing pages from the tablet), then perhaps a few attempts later the final RN was ready.
Maybe I misspoke, I didn't necessarily mean that the injuries themselves were revised - but the whole scene - making it look like an evil perp had been vicious in his methods.
I guess the point I am trying to make is that while I believe a Ramsey did it - I don't believe they were evil monsters who carried the whole thing out with evil at the forefront of their minds. That she was wrapped in a blankie somewhat supports this.