I know a lot of people didn't like it.
But MM's Sidewinder talent is how most of the talents should work, but sadly do not.
It changed the way how the spec was played, it came at a cost, it did benefit a very specific playstyle and it was still very competitive (and strictly better in spread-aoe cleave situations) even after they buffed the "standard"-non Sidewinder build and made that one more than just viable.
That's how talents should define your spec/build.
P.S. I want Legion-MM back
I still have some random shadowplay moments on my PC where I hit the record button on accident and it looks so awesome.
The current/BFA MM version can't compete in the slightest.