His production certainly wasn't a "problem." The fact that he could be as productive as he was and make as many big plays as he did while still "taking plays off" speaks to how much more productive he could be as he matures. And maybe so many of his big plays came in our biggest games because his intensity was higher.
TWilly just has a lot of odd traits which don't really point to dominant player worthy of #2 status.
From Broaddus today: "3). Heard an interesting explanation from Derek Dooley on why
Terrance Williams is a body catcher. Williams’ hands are smaller than most receivers’, and the more that he has had to play in his life, he has had to learn to compensate for them. Dooley works with Williams every day on catching the ball in his hands, but he is not trying to break Williams of this habit. Dooley said there is not a better receiver in this group that gets separation and comes back to the football than Williams -- which allows him to use his body to make catches."
The problem is for all of his separation, he has trouble with high pointing without the confidence with his hands. He did not extend his arms in the Texan game and whiffed on two plays at the goal line. The 3rd and 1 play that Romo threw in the Packer game was an excellent pass by Romo but not to a player who does not physically position himself, contest the highball and pluck from the air. TWilly just kind of fell backward and expected the ball to hit him in the neck. Basically other than the Seahawk catch out of bounds, I can't think of any other impressive catch. He is an odd bird. His first year he caught 44 out of 74 (59%) targets and second year caught 37 out of 64 targets (57%). He has the 13 TDs in two years and gets 16 yard per catch average but he just seems sporadic and limited in physical ability (4.5/40 is really not that fast if the average starting NFL CB runs a 4.45/40).
Seems like maybe his taking plays off points to TWilly being more of a #3 or 4 WR who has more of a limited role but his 3-4 chances per game become potent chunks of yards or TDs at pivotal moments.