As a high school O-line coach, IMHO, this is not the best way to build a really dominant line. O-linemen do best when they have one spot to focus on, and then the line can build chemistry and cohesion.
On the other hand, this is a better way to create a line that can survive injuries. We won't rely on the health of each of our guys to have a competent level of Oline play.
For a twelve game schedule with teens? I like picking spots and building chemistry.
For a 17-21 game schedule with full-grown adults? I can see the logic in what they are trying to do.