Trade 78 and 47 for 33 to get a guy who you had ranked at 22, then maybe-- if you don't think highly of the talent that will drop to 78. IMO this draft is deep enough and Dallas needs quantity and quality.
This is the reverse of getting Marc Stepnoski, Rhondy Wheston, and Willis Crockett for Steve Wisniewski. Wisniewski was a dominant guard, but Stepnoski was a solid enough center that taking a chance on Wheston and Crockett was worth the difference.
If you think DeMarcus Lawrence won't fall to 47 but Crichton will, then is Lawrence worth both Crichton and Jackson Jeffcoat?
In hindsight, Jimmy should have stuck with Wisniewski because Wheston and Crockett weren't worth the price it too to fly them to Dallas.