I have no respect for the Saints as an organization but this is a pretty dumb move. Saints had their best success when they had a great stable of running backs, each with their own little flair. Ivory was a solid player.
Pierre Thomas is an every down back, hes no all pro but he gets things done. Sproles is an absolute lethal back who provides upside in the passing and return game.
I'd love it if they ditched those two, our front seven can absolutely manhandle a guy like Ingram. Its those slippery backs who can also catch and run routes who give us the most trouble, as it forces us out of our comfortable formations, ESPECIALLY when you have Graham as your TE. Honestly ditching these two is going to give us a LOT more flexibility on D dealing with them. Robinson isn't exactly a slouch, but most of his production comes when you don't expect it BECAUSE of the versatility they currently have at the position.