Doesn't all the gnashing of teeth need to come after you know what the offense will look like? If they are planning to change the offense away from the Kellen Moore/Jason Garrett debacle, and to something else - and I have heard here, and other places, it may look more like the West Coast, I cannot confirm that - then the pundits on this message board and their jocularity could be well misplaced.
For me the big questions are, can Cooks get separation? Can he get deep and stretch the defense? If the answer to both of those questions are yes, then where he starts when the ball is snapped is of no concern.