This process of pre-visualization meant that when filming did get underway, everybody was already aware of what shots needed to be captured, and so no time or effort were wasted.
As Jon Favreau explained, it mimicked the efficiency of doing reshoots on Iron Man, which is exactly what he wanted…
The newest episode of Disney Gallery: The Mandalorian takes a look at the show’s visualization process, specifically, the fact that the series used VR and animatics to basically design the show, right down to the camera angles that would be used, before any filming was actually done.