Whenever the press is handed a heavily redacted document, it gets to make up whatever horrible shit it wants that makes the redacter look as bad as possible. Like, "according to my non-redacted copy, in this paragraphs it says 'top NSA officers enjoy clubbing seals and eating kitties'". If the NSA wants to dispute said observation, it has to disclose the actual contents of that paragraph.
He didn't fill any of the government provided whistleblower forms nor solicit a whistleblower license. He also didn't use the double-secret special whistleblower handshake, so clearly he isn't officially a whistleblower.