Any potential prosecution will involve someone from the DA's office reviewing all evidence. How many officers want to be seen as an overt bully by even a (probably) friendly suit in the DA's office?

Who wants the first thing the jury notices about the tape is how very rude the officer is?

A long time ago, police whined and whined and whined about how the Miranda Rule got in the way of getting convictions. The real result is that police forces are more professional now, and it raises credibility in the eyes of juries. Yes, police officers have crafty workarounds to trick people in confessions while they are "not quite yet" suspects. But that is a big step forward. Officers are working from a standard set of procedures that have been reviewed by attorneys and the court system.

Police raised their game.

The same will happen here. Citizens will be more compliant. Officers will be more polite and more professional. Police will raise their game.