One of your ideas has been delivered from your suggestion.Result Investigators Now Receive Assignment Notifications

Result investigators now receive notifications not only when controls generate incidents, but also when investigators are assigned to incidents after the incidents are generated.  To manage this information, you can use the Settings for Email Alerts and Notifications for the Advanced Controls business area and the Incident object.

Notification when an investigator is assigned to an incident

Incident investigators are expected to review and update the assigned incidents. This notification let them know there is work for them to do.

Steps to Enable

You don't need to do anything to enable this feature.