I've been saying they were more efficient. I'm simply pointing out that the total output of points is similar to previous seasons because the offense couldn't convert on 3rd down, and also because the defense couldn't get off the field. Here's a quote from a previous post.
And yes, the defense sucked. I never said they didn't suck and wasn't building a defense for them. They did suck but they had aspects of play that helped the team and I feel there are a lot of points that they pretty much put on the board. No different than saying the defense sucked while recognizing that they improved their takeaways by 12 when comparing 2012 to 2013.
As far as points/offensive series, they're only up to any extent worth noting if you accept that there were 6 FGs and 4 TDs where the offense failed to gain less than 5 yards. I don't think it's all that accurate to include those because it required little to nothing on the part of the offense to score the FGs, and nearly any offense in the league would have scored at least a couple of TDs if they were given the ball inside the opponents 5 yard line.
For the FGs, the only way the team doesn't get a FG in that situation is if there's a turnover or so much negative yardage that the team is out of FG range. They had negative yardage on one of those drives and 0 on another and yet these points get attributed to the offense?
As for the TDs, having 4 drives that combine for 12 yards and 4 TDs is not any sort of measure of offensive productivity. Goal-to-go effectiveness perhaps, but it doesn't make any statement about how a team performed over the course of the season. These instances are not only extremely rare, but when they do happen teams almost always score. In the last 5 years there have been 106 such possessions across the league. Excluding the 6 occurrences where teams kneeled to end the game, teams scored TDs on 75 of those 100 possessions and FGs on 16 of those 100 possessions. 91% of the time a team has taken over that far into the opponents territory they've come away with points. Over the last 14 years, the TD percentage is 77% and the FG percentage is 15.6%.
Statistically, if you put any team in that position 4 times they're going to score 3 TDs and most likely add a FG to it. Arizona somehow got 4 such possessions in 2012 and even with one of the worst offenses in the NFL they were able scored 3 TDs. One of the worst passing games in the NFL and dead last in rushing yards and yards per carry and they still scored 21 points on these possessions.
It doesn't take a good offense to score on these possessions and their occurrence is pure happenstance. Most teams are lucky to get 1 in any given season. There are 13 teams who average 1 every two seasons or worse over the last 14 seasons, and there are 6 teams who have as many in the past 14 years as Dallas had in 2013. Normally these possessions are inconsequential just because of how infrequent they are but when you start getting an abnormal amount of them, they start inflating the numbers.
Without those scores, the team is slightly above where their point totals have been over the last 5 years. But, as I said they did it with fewer plays so they obviously improved in efficacy. After removing points attributable to the defense and those drives from the totals, here's what the points/drive looks like.
2013: 2.03 points/drive
2012: 1.92 points/drive
2011: 2.00 points/drive
2010: 1.89 points/drive
2009: 1.89 points/drive
Little bit of improvement when moving from 2012 to 2013 but not substantially higher than past years.
Just my opinion. I think a more practical reason to keep these numbers in mind is because past performance heavily influences future expectations. It's almost certain that Dallas won't get 4 possessions that start inside the opponents 5 yard line next year as they'd be fortunate to get just 1. It's also highly unlikely they will be able to put as many points on the board without having to move the ball. They had 10 scoring drives of 5 yards or less in 2013, 8 between the years of 2009 and 2012. Any expectations of similar point totals to last year may be overshooting things.