I like this and have been working it in with my drills. It is actually easy to step any direction, even using the Shotokan turns and coordinate rapid hand movement as your turn.
It is also easy to slightly modify this by turning the muzzle 5 degrees or so in a turn. I'm teaching a class of M I Basic Officers Course today and will include this as a way to exit a Humvee if necessary.
Have you shared this with Ed Stock, or Mas Ayoob?