For those advocating trading down, keep in mind that with each round the odds of picking a future all pro player diminish significantly with each round. In fact, most future all-pros are drafted in the top half of the first round. Moving down to 22 leaves players like Mazi and Guyton on the board. The odds are much greater the player will not be a first round talent.
The Cowboys don't need JAGs. They need impact players, particularly on the DL. If there is a Fletcher Cox, or Vita Vea there at 12, they would be wise to take him. One player like that will have more impact than 2 players taken in later rounds.
Having said that, I don't think there are any Fletcher Coxes or Vita Veas in this draft. We'll have to see how the combine and senior bowl games go. And this is another point, sometimes it is luck of the draw. Some years the guys you really need are not in the draft when you are drafting high.
IMO, the Cowboys are such a mess right now that taking BPA is the best strategy. Which player will make the biggest impact for the Cowboys over the next 4 years. If it is an OT, then take him.
The draft boards are going to change a lot between now and April. It should be fun.