I think putting Dez back to return punts is a bit too risky. He could easily be distracted over his pet monkey, get served with legal process over jewelry while the ball is in the air, or even get into a a legal spat with a public official over a rental contract. That is just too much to ask of a guy you are only paying $70 million US Dollars to. There have to be boundaries, people.
It could also take valuable time away from his mediocre route running, dropping balls that cost us games, fumbling the ball, or sulking on the sidelines. Besides, who is going to be in Dak's ear trying to get Dak to throw it "up for grabs" in Dez' general area with him double covered with zero separation, if not Dez?
No sir! Dez is far too valuable to distract him from the above, AND MORE!!