Dallas ranked in the middle of the league in run/pass ratio in its normal offense. Most of the teams that ran more than the Cowboys when the game was close through the first three quarters became one-dimensional when they were trailing big late in games -- a situation Dallas was seldom in.
Run %
Margin 8 points or less
1st Sea 52.6%
16th Dal 42.9%
Qtr 1-3
1st Sea 53.6%
14th Dal 42.6%
Note that the Cowboys controlled the clock better (and moved the chains much better) with Amari than pre-Amari.
Weeks 1-8
TOP per drive 2:57 (7th)
yards per drive 30.5 (23rd)
fewest punts per drive 41.7% (24th)
Weeks 9-19
TOP per drive 3:15 (2nd)
yards per drive 36.2 (9th)
fewest punts per drive 34.5% (9th)
This should be expected if you want to have a balanced offense. However, what the stats don't show is how much respect defenses had to show to the offense's running game, thus opening up things for the receivers.
There's two sides to last season. The first half of the year, defenses didn't have to worry that much about the receiving corps so they could focus primarily on Elliott. The second half of the year, defenses had to come to respect Cooper against single coverage and pick and choose when to focus primarily on Elliott. So, we definitely should have controlled the ball and moved it better after getting Cooper unless Cooper was as ineffective as the receivers we had the first half of the year.
We are an offense where the threat of the run game is just as important as actually running the ball in forcing the defense to make choices. Of course you could say that about a lot of teams, but some are built where the threat of the passing game opens up things for the running game. (I would say New Orleans falls into this category.)
Second half of the year, we also had Gallup beginning to assert himself as the second receiver. Of course, cause and effect also is play here as we don't know how much of that was due to Gallup's improvement and how much due to having Cooper on the other side of the offense.