Predictable. When his cheat sheets are outdated and the coaching turnover they applied to takes place, Billycheat would be done - unless he could find another way to renew them was my guess.
Even with paid-off officials and bugged lockerrooms (remember when Peyton Manning leaked that story and it was immediately squelched?) and jammed signals on the frequencies of opponents headgear so playcalls couldn't come in fromthe sidelines (I don't remember which games or opponents, but it was news until squelched when it happened) and deflated balls that are easier to catch in cold weather, and stashing IR players on the practice squad and... I've lost track of fall that was reliably reported and squelched... and that's before wqe list the dirty, cheap, permanently damaging play of at least one hired assassian (usually more) on his rosters, and plays that were sent in to take out specific players in key games. (Boldin's eaarhole shot against Avirl in the Seattle Super Bowl. anyone?)
Billycheat is not a good person or a moral human being. Too bad his departure will not be more ignominious. He's done more harm than good to the game.