Police do not de-escalate anything, and we should be well aware of that. They are more military than anything else, did you see the video of that Arizona cop (Philip Brailsford I believe)? Shot that kid dead. Was acquitted, because we don't hold cops responsible for their executions. Deven Guilford was shot by cops on a traffic stop as well, and that was escalated by the officer (who again was cleared of wrong doing, but the family did win over 2 million dollars in the lawsuit on that one). I would never trust a cop to try to deescalate anything. There are plenty of good cops, but when you have a random encounter with a cop, you don't know if you have the good one or the bad one.
And yes, less that lethal can be bad when used improperly. But we do need better, less than lethal tools for the police so they can turn to something other than a gun. I'm not opposed to proper training and tools for the police, in fact I think it is necessary and more should go into it.
That being said, the guy came up to the officer who asked him to step away, he didn't. He didn't take his hands out of his pockets when asked either. This situation was ultimately uncalled for and escalated too quickly. But had both sides been a bit more courteous and professional, it wouldn't have. The cops involved have reportedly been "disciplined" (though what that actually means, I don't think we know), Sterling should still get that ticket though.