This is a great point. It would make a lot more sense simply to require a 25-foot easement along the lines of the checkerboard for unrestricted public access or a road. That would have the effect of forcing the ranchers to move their fences back ~12 feet.

In compensation, ranchers could be given the right to create structures or rights-of-way on those same easements to connect their diagonal pieces so as to make them more useable, as long as the public has a reasonable right to access their areas.

This situation honestly makes me wonder how the ranchers even use these squares, since they face the exact same access problem, just with the opposite corners.