I don't see police accepting this, and it is hard to not feel kinda hopeless about the situation, since it is linked pretty tightly with the 2nd amendment.
An incredibly difficult - but more possible - response is to raise accountability for police officers and their actions. As it stands now, it is virtually impossible for a police officer to face serious repercussions for shooting someone, no matter how bad it was.
Seven years ago, in Detroit, a SWAT officer threw a flash grenade into the wrong apartment and hit a sleeping seven-year old girl with it, then shot and killed her. He was cleared of any wrongdoing and is still a police officer. In the case of Michael Slager murdering Walter Scott, there was video evidence of him shooting an unarmed man who was running away, then planting evidence on him - jurors refused to convict him, and it wasn't until he pled guilty to other charges that he actually had to serve time.
It feels like these things happen on a weekly basis, and judges and juries are perfectly happy to side with police no matter how egregious the shootings are. We, as a society, have basically said the police can do no wrong when it comes to shooting someone, and the consequence is that a lot of innocent people are getting killed. Until that changes, I don't see how the police will change their practices at all.