I don't know why you want to dismiss Edmonton. I've had the same experience in Beijing and Shanghai, where there are even more cops just standing around than there are in Center City, Philadelphia. And Chinese cops probably make less than a fifth of what Philadelphia cops make. Just the physical presence of security in overwhelming numbers is a major deterrent to crime. When Scarborough Town Centre, Toronto had a problem with swarming in the mall, a police station was built right in the mall, and the swarming problem disappeared.
And you haven't addressed the other half of my argument, which was for individual liability insurance for officers (like already exists for doctors and nurses) replacing qualified immunity. The problem of acting with no jurisdiction would also disappear if cops could be individually sued for their misdeeds.