Antitrust is the fatal conceit that says government officials can and should break up certain dominant companies in order to maintain competition in the marketplace.
Sears had shifted with historical trends, and surely the company would see that it could bring its resources to the shifting retail landscape in order to remain dominant.
While the box grid imposes order, it is challenged by the size and proportion of the niches and by the asymmetry of the dominant horizontals and verticals.