There are just over 60 deaths per year, and I think that the CSC should investigate in every case. If the facts are very simple, there is no need to spend three months on an investigation. If someone dies from a heart attack, the file is checked to determine whether the previously provided care was appropriate. That can be done very quickly.
I think that more difficult cases should be addressed, but nothing should be let go. What may seem like a natural death can be a premature death caused by the fact that health care was inadequate or there was no oversight. All that needs to be reviewed, and an independent investigation must be conducted for every death.