I don't think this means the Coroner's "office" will be removed from cases of suspicious deaths and homicides. The forensic pathologists will be schooled and appointed as "Coroners". What's changing is that the forensic pathologists will do the complete investigation, from attending the crime scene to doing the autopsy to testifying in court. Rather than the Coroner attending the crime scene, the pathologist conducting the autopsy and then the Coroner testifying in court. The Coroner's office should still have a record of an investigation or inquiry if there is one.
http://news.ontario.ca/mcscs/en/2013/08/ontario-strengthening-death-investigation-system.html
JMO
The position and office of Chief Forensic Pathologist has been established to handle the Coroner's role in court on specified cases. I expect and hope that there will be communications between the two offices, but it does essentially allow bypassing of the Coroner to a point that the Coroner could say that his office didn't handle any particular evidence.