I probably don't have a good opinion here but I'll throw my uninformed one out anyway.
One thing we need need need* is for Cops to have partners again and work in pairs. This is really freakin' basic for police safety and peace of mind. With somebody backing you up all the time you feel safer and more confident, and you are safer with some backup. My step-brother is a (long retired) homicide detective in Los Angeles County and when they started sending him out alone instead of with a partner he basically starting aging like Obama did in 2008. Even my store has a rule that we open with two people because the risk of attack at open goes down by something like 92% from two people (boss researched it in detail) instead of one.
I'm not always fond of British things but I like some aspects of their police force. In particular they make a difference between "Bobbies" who are the neighborhood cop who's job it is to maintain a good relationship with the neighborhood, and the heavily armed types that deal with actual threats**. Right now police have to react to everything from "my neighbor's music is too loud at 11:00am" to "guy with a bloody axe is chopping down my front door." I think having a Bobbie type cop who's training puts a heavy emphasis on diplomacy, de-escalation, and maintaining a good relationship with the public would help more with the former, with more traditional heavily armed cops reserved for situations where violence is more likely. Perhaps both could be combine with Bobbies being paired with SWAT types so that the Bobbie can be the face in every situation that isn't going to devolve into violence and the SWAT type having her back and making sure the situations that do devolve into violence are contained.
*six more needs redacted.
**The UK doesn't let the street cops even be armed, I'm not proposing going that far but rather an emphasis in training and possibly a uniform designed for appeal and style rather than intimidation.