If Tom Donahoe and Mike Mularkey had any real authority or respect, then Ralph wouldn't be the one dealing with the Moulds problem.
It reminds me of the end of the Pete Carroll era in New England when he had discipline problems with WR Terry Glenn. When Glenn had problems he would go over Carroll's head and deal with Bob Kraft and VP of personnel, Bobby Grier, because he was their pet pick. The last straw was when Glenn claimed to have the flu, didn't show up at Foxboro, and failed to get checked out by team doctors. Carroll suspended him for the last game of that season, and was fired by Kraft shortly thereafter.
Now I'm not saying that Eric Moulds' is anywhere near the problem child that Glenn was. Or that his issues are the same. My point is that when you have a player with problems dealing directly with an owner, it's a sign that the coach isn't considered the boss anymore and the handwriting is on the wall as far as the end of his tenure.
It doesn't sound like Donahoe is considered in charge either.
The Patriots didn't clean up their act until Kraft put Belichick solely in charge of player discipline and stopped meddling.