Here are some things I know for a fact.
Only 32 players will be taken in the 1st round. When you sum up all the conjecture about who will be first round picks there are about 45 guys who will be drafted in the first round according to analysts.
Only 11 players will be picked before Dallas. Getting the12th best player, or someone even better if another team reaches for a player, should improve the team.
If there is a run on QB, WR, RB, CBs and DEs, then good players at other positions will fall to the 2nd round. We should hope for a run on QBs, OTs, and DEs in the first.
When the draft is over, and we assess our selections, keep in mind all 32 teams just drafted players too. Everyone thinks their draft is full of gems, at least until September.
Something I think:
I don't think any of the DTs in this class are clearly dominant players. That doesn't mean someone won't emerge in the pros, but there are a lot of DTs not separated by much. At the same time, that group is better than average. This is real need for Dallas and they should take advantage of it. If they draft 3 DTs this year, it will be a good thing. This class has a group of huge dudes who can play. Get one at least. And then find a more athletic guy. Do not assume any of the free agents Dallas signed will even make the team. Think Jordan Phillips.
The same is true at RB. Take 2 and don't look back.