A modern engine design not being able to cope with ice,
This is really a silly comment, ice has always been and will always remain a permanent challenge in aviation, regardless of how state of the art equipment is. Sometimes subtle changes to engine (pitot tubes, etc, etc.) design can introduce unwanted icing side effects, often it is impossible to predict it just based on theoretical modelling and ground or in-flight testing only covers most nominal scenarios.
This reads OK if the modifier is :"too much ice...."
After all we do have regulations, that if met, will provide a significant measure of protection. It would appear that this latest problem had to add a crutch fix to finally meet the desired level of safety. If the problem was too much ice, not anticipated in the development and certification, then all models of all engines would have to address the issue at the same time since they all fly at these altitudes 0-20000 ft