Think it's time for Russell Domingo to hold his hands up and admit he's out of his depth. He inherited an all conquering side from Gary Kirsten. But post Smith and Kallis' retirements, Domingo has been totally exposed. In some aspects he's like former England coach Peter Moores eg stats obsessed. Unfortunately, as Moores found out, the game isn't played on paper.
I think the Proteas should appoint Graeme Smith as their head coach. This is a man who bleeds for his country, is as hard as nails and a natural born winner. Throw in Pollock/Klusenar/Kallis and the sinking ship can still be salvaged.
One final change would be Dean Elgar replacing Hashim Amla as skipper. Amla's too laid back to be skipper. Elgar has been South Africa A's skipper and he's been positive and aggressive(from the match I've seen against Australia A). Someone like AB de Villiers is too important to be saddled with captaincy.