From what I can tell there was not much substance in these leaked docs that was not already known. What is mortifying to the State Department are the candid assessments of other people and countries that they contain.
Depends how how you define “not already known.” What I liked about the leak was the confirmation of what we already know or suspected, despite every government agency’s denial. We suspected that the government was pulling the wool over our eyes on a vast array of these issues. The wool has been removed.