If you’ve noticed that I don’t actually praise any modern swings, that’s because I feel they are mechanically-unsound, dangerous to the average person and simply not something I’m going to go out of my way to say nice things about.
Brooks however has a motion that like Hideki Matsuyama, is actually about as benign as you could expect from a modern, planted-heel swing.
Yes, there is still the rubber-band torso twisting on the back swing, with the loss of proper leveraging position at the top, but what you see is a swinger who, while using a modern technique, is swinging under control and not hyper-twisting to the top.
He also has the requisite knee-snap with the leading leg through impact, which is why I’ll never advocate a swing like this. Why destroy your body, or even one part, like a knee or hip, when you can swing another way and not do such damage to yourself?
Brooks Koepka Golf Swing
I’d never teach a motion like this or Hideki’s, but if someone came to me and asked, “I’ll never float my heel, what do I do?” I’d point to these two fellows and say, “You could a lot worse than these two guys with a planted heel…”