From the report the crew did what was taught and that they had a reasonable expectation that the aircraft would respond in a predictable manner. Why would crews not be told about the removal of the CWS function? This type of incident has occurred with both Airbus and Boeing yet the airlines don't want to learn from them. Airbus reinforced the need to use the speedbrake to control an overspeed several years ago. Cabin crew were being injured because both pilots were pulling back on the side stick with the Airbus logic summing the totals of the individual inputs. There appears to be an attitude that if it hasn't happened to us then there is nothing to worry about.
There is nothing in the report that suggests that line pilots were advised that the CWS-P function had been removed and of the possible consequence. What were the Fleet Managers doing? If their pilots are trained to use it to control an overspeed then it is bordering on negligence to not tell the pilots it had been disabled. If the Fleet Managers were not aware, then there has been a significant breakdown of communication between the engineering departments and the flight operations departments which is also a concern.