That said, I am not sure if the take-away is that managers need to account for these factors by allowing for illegibility- I am not reading you claim that, but contextually that's how the discussion feels to me.
I do agree with Scott that enforcing perfect legibility is impossible and even attempting to do so can cause immense problems, and I agree with his analysis of these modernist efforts and have found that it's a useful lens for understanding a lot of human enterprise.
I find a lot of hope in that view: nothing actually gets done without some horizontal, anarchist cooperation.
But I also find hope in the fact that it's structurally a issue with authoritarian organizational strategies which can't be accounted for and surmounted.