I can't imagine the distraction wouldn't outweigh the possible reward, so no I don't think he would have been brought back.
Had Dez been in camp, he would have attracted media whether he wanted to or not. Even if he tried to behave, he would have been the story, regardless of his role on the team.
Dez, even if he wanted to accept a lesser role and be good, has never been wise in what he says. When he was simply a role player, he would be asked constantly. The media would have eventually twisted something he said into a larger story because Dez doesn't know the meaning of "no comment."
Finally, the biggest worry with Dez would be the influence on the younger players like Gallup. Dez never was a hard worker, never was known for being punctual to meetings, and never was known for being the best student of the game. Could he come in and do those things? Maybe...but there's a risk that the tiger doesn't change his stripes. And by the time he could be cut loose, the damage could be done.
So, I do think the Cowboys would have toyed with the idea, but in the long run, I think the odds would have been against Dez rejoining the team- with or without Lamb.
