Not sure what you define as a credible source.
All I know is that OBD, specifically the PR firm, have no vested interest in ever clearing it up. With the shadows surrounding Nix's step down and Whaley's Ascension, it allowed them to paint all the bad calls (EJ, any 2013 bust, Fitz) as Nix and all the good moves (Hughes, Woods) as Whaley's. Perfect to sell tickets.
Tell me who traded for Hughes, prove me wrong.