Probably would have worked for 2015, but the O is already paid 13 mil more than the D, and DeMarco's deal only widens that gap.
Then 2016 would have been a problem with a similar cap to 2015 yet salary increases to Romo, Bryant, Lee, Bailey, and Smith plus at least 4.5 million of Hardy's 2015 salary from NLTBE's.
They are deficient in defensive talent, need to lock Hardy up, another strong contract on the front four, another at LB, one to replace Carr at CB, and a real safety.
That philosophically leaves Dallas drafting a stud RB every three years and never signing one long term.