MistaT watch the pre-season games. There was actually a lot of movement there. Across the front, within the midfield. From the fullbacks to midfield. You could see the team were comfortable in their basic structure and were allowed to jazz it up a bit more.
The thing with freedom of movement in these systems though is it has an impact on defensive assignments should you lose the ball. If everyone is scattered, you will be easy to cut through. A lot of offensive positioning is driven by the ability to quickly recover possession should we lose it