I'm not sure this autopsy is going to provide much in the way of answers anyway. That's not because of any wrongdoing or incompetence on the part of the medical examiner or anyone else -- it just might be the way it is.
One thing the autopsy could show was whether it is true that a number of her bones were broken earlier by her husband. Also, whether her neck bones were damaged around the time she went into the coma. It wouldn't necessarily prove anything, but it is a matter of interest.
Or the coronor could conclude that such earlier damage is irrelevant to her death, and therefore not mention it.