It still makes little sense to me, but Orgeron is one game shy of .500 as a HC now. He won 75% of his games as interim HC at USC (6-2) and has won 75% of his games as HC at LSU (both interim and full time - 15-5). If you assume he can continue to win a rate of .750, he'll be alright at LSU.
Remember, Miles was 39-13 (.750) over his last five seasons (after the BCSCG loss to Bama). It's early, but so far Orgeron hasn't been the disaster most expected. I don't think the man has what it takes to win the SEC, but he's not worse than Miles so far...