I can't fathom that anyone from either side of the aisle would want the autopsy results released before trial, nor can I believe there is some sort of vast conspiracy theory from the prosecution when the defense has the same access.
After the field day that has been had with a bunch of social media videos, analyzing, accusing, diagnosing... can you imagine the circus in the public and media if the autopsies hit?
They would both be tried in the media until a fair trial and impartial jury would be impossible, and the trial is a long ways away. CW's lawyers are already complaining about media and leaks.
People would have every page spread out everywhere, there would be arguments and analysis about handprint sizes and cause and time of death and who did what when.... No one but the experts should have any access to that until the trial is underway. JMHO.