I agree there is prob not a lot of benefit to changing the current storm ranking system -- Those of us that frequent this website may be sophisticted enough to care that a faster moving storm amplifies the wind speed of the R forward quadrant in the N hemisphere and that there is less total rainfall with quicker transit. But to the public in general, some authority has to determine the safest actions -- evacuations, shelters, etc and try to provide relief afterwards. More complicated will likely mean only more of the population will not understand.

No matter what warnings are in place there is always a significant group that has an excuse to ignore warnings and recommendations - Guarding the property, don't believe the mets or gov't officials, been through it before and had no problem etc, etc, etc. For those I can't imagine any more sophisticated warning system will be helpful -- they will ignore it anyway.