You've got to be kidding. Every NFL person you could talk to would tell you that it worked out perfectly for Dallas.
Almost anyone in the league will tell you that at worst, Julius is the equal of Kevin Jones, Steven Jackson or Chris Perry. In addition to getting the running back we needed, we also got a good blocking TE project in Ryan and Marcus Spears.
Spears is widely considered to be a perfect fit for what Parcells is trying to do on defense and is already running first team. At worst, he's going to be a solid, block eating DL who allows others to make plays. He's super talented and moves like a 250 pound guy in a 295 pound body.
Some would argue that getting Jones instead of KJ, Jackson or Perry makes the move worth it, without even factoring in the other players we got.
To label this move as a worse move than Wiley, Goodrich, Larrimore, Carter, Leaf, firing Jimmy Johnson, and all the other horrible moves that could be listed is either insane, or just done to grab attention.