Would be nice for whom? There are federal and state privacy acts that limit what information federal and state agencies can release about a person, including a dead person. And there's a history and good reasoning behind them.
So further to this, apparently it varies by state as to whether autopsy reports are public records. In many states they - but that doesn't mean they are fully released. There may still be state privacy acts that require redactions of some information and photos - and you might have to use the state's FOIA process to obtain release. Other states have outright prohibitions on the release of autopsy records.