If they're not going to use him like any smart team would use their #1 WR after giving them a huge payday, then they should have let him walk. Jerry should force Garrett to study how other teams are getting the ball to their high priced WRs...
Des doesn't have the elite speed to run by anyone. He isn't jittery quick like some. He doesn't run great routes where he fools anyone. So the reality is that he just haven't have the type of toolset to create much separation.
Outside of a blatant pick play how can an offensive coordinator get Dez open? I don't see it happening. Not ever with any consistency.
What made Dez special last year is that he was using his size to shield defenders, his strength to outmuscle them, his hops to out-leap them. All of this is predicated upon being trust-worthy in his techniques and having a quarterback willing to throw him the ball even though well-covered...and in being *precise* in where to throw it.
Romo and Dez were killer, for instance, with the back-shoulder fade...and in those lofted sideline routes where Dez would only need to beat one defender.
The issue is not only with Dez getting healthy, but with the Cowboys quarterback situation in the future.
I agree that this offense doesn't seem real creative. But I don't think an OC's scheme is going to fix this as easily as you suggest.