It worked once in Dallas, but, the was with THE BEST COACH ever in the NFL.
I haven't like when HC's handle play calling as well.
Let the HC be the HC and have the coordinators do their job.
O-line and D-line both need to be revamped. But, how to fix that O-line? With young players. If that is done, could be another season with Romo running for his life.