As Richard took over the defense zone, the four basic battle zones under his command began promoting the new tactics.
The example of a single basic battle zone was too small; Richard needed more data to corroborate his views.
As for the impact of this tactic... that's something for the council to worry about.
Compared to a Great Wizard like Richard, the few Crown Thrones of the council are the ones truly concerned about the survival of the Wizard Civilization.
The destruction of the Wizard Civilization greatly harms the property of the Great Wizards, but for the Great Wizards themselves, it's merely the loss of dimensional power's blessing.
But for the Truth Wizards, it's not the same.
The destruction of civilization would lead to the collapse of dimensions, and the Illusionary Dimensions that rely on their existence would also collapse.