Cedric could of been a bust for his first couple of seasons, but Shaun is done. He's gone through his prime, in the long run it would be better to sign Cedric. However Perry is their main back and Benson won't get that many touches unless Perry gets injured. It wouldn't have been a bad idea to put a more experience back behind Perry like Shaun though.
However since my name is Cedric as well, i'm very biased about Mr. Benson
Perry is currently stinking it up but they also have Watson behind him. I think the Benson signing is more a case of any one of the three having a chance to take the roll and running with it. Even if Shaun was possibly not done, he'd expect a large roll. Situation just wouldn't make any sense. I'd personally like to see Perry turn things around but Watson looked pretty good at the end of last year. I'm kinda curious to see how they start working all 3 of them into the offense. I think Fitzpatrick is starting again this week so they'll want to run as much as possible. Problem will be the Cowboys will probably score so much that they'll have to abandon the run pretty early.