IIRC, part of the problem of trying to evaluate Tesla's middle and later work was that he became seriously paranoid about plagiarism. His drawings and other documentation would omit essential parts / detail, even include flagrant misdirection to thwart potential theft. After the disputes with Edison, I'm not really surprised. Snag was he seems to have convinced himself that he, and only he was the authority on many technical matters...
And, after that, the only way was down, into raving petulance or worse...
Sad, really...