I think teams, the Cowboys included, are still very cautious with Pickens because they should be.
He is a talented guy but can't overcome poor QB play or a down offense and when faced with one he lashes out... which is why he's in Dallas to begin with.
Heck, even here, getting fed the ball regularly, he had to be benched to start the Raiders game, caused a few dumb penalties, and had one of the worst drops I've seen against the Bears that ultimately cost us the game.
I get it. He's good but could be a Brandon Aiyuk situation real quick!