This is not what I am arguing at all, but I will take the bait.
The "non AD" crowd are basing their opinion on facts and stats while the "pro AD" crowd are basing their opinion on speculation and hope. I am not saying it will definitely go one way or the other, but there is a more rational side to the argument.
I want to first state that Emmitt Smith is my favorite player of all time and is one of the greatest players of all time. Saying that, I would take what he has to say with a grain of salt. Just because he was a great player does not mean he is great at player evaluation. I am confident Smith has not looked at ADs medical record or spent everyday working out with him. Smith can also not tell the future to tell us if AD has hit a wall or not. I would also not trust Smith with running a football team. He does not know how to run a football team, I don't believe he ever said what he would give up for AD.
Saying all of this, I would take AD for a 4th rounder and a pay cut.