I find this very relevant for a number of discussions we have here.
My first impression in reading this is that it helps Dispensationalists justify their approach to understanding scripture. And if they played by the rules everyone else does, they would not be Dispensationalists.
Do you disagree that the analogy of scripture requires some judgment in application? I do not really understand your point.
I found it interesting if not amusing that the Progressive Dispensationalists complained that; ".....clear texts should interpret obscure texts" [normally accepted by Christendom] .... can be problematic".