Not to mention the fact its not a "system" every department uses what they choose to use. I know one department that solely teaches BJJ to its officers, Our department uses a system developed by the state Police. They review every instance of use of force every year and evaluate the training based on real world results then adjust to meet the needs.
I know other departments that teach a little boxing and a little grappling.
I know some departments that dont teach anything.
So I'm not even sure what "system" your trying to bash here?