I'd like to get back to this.
The 2011-12 Rangers were a high PDO team (top 5 in basically every situation). It was mainly Sv%-driven (top-5 across the board), but Sh% contributed a lot as well (lower end of the top-10 range). But the 11-12 Rangers were not just a top PDO team, they had their best PDO in the situation that has the highest impact: 5v5 tied. Despite being outshot in that situation, the Rangers scored the tiebreaker more often than not. Considering the non-repeatability of PDO, that is a quite a lot of things bouncing the way of the Rangers. Not only did they get above-expectation PDO (a team with Lundqvist should expect an above 1.000 PDO, but not to the extent the 11-12 Rangers got), they got it at the best possible moments as well.
Now by raw PDO the 13-14 Rangers aren't getting THAT rough of a deal, a .994 in all situations puts them 21st in the league. I'd say that the Rangers should be in the 10-15 range if we go by player talent, but 21st isn't that far behind. The problem is that the closer the game is, the worse the Rangers' PDO gets. When the games are out of hand the Rangers' PDO is high, but when the games are tied we can't score to save our lives and our goaltending is at it's worst.
If the 13-14 Rangers got the 5v5 tied PDO of the 11-12 Rangers (1.016), they would score 60.8% of the goals in that situation (1st in the league, current leader Chicago: 59.6%) instead of the current 44.3% (26th).
If the 11-12 Rangers got the 5v5 tied PDO of the 13-14 Rangers (0.971), they would score 38.7% (30th, actual 30th Edmonton: 42.2%) instead of their actual 55.2% (5th).
Given "normal" PDO's of 1.000 (let's say 7.5% Sh% and 92.5% Sv%), the 13-14 Rangers would have a 5v5 tied GF% of 55.5% (6th in 13-14) and the 11-12 Rangers would have a 5v5 tied GF% of 49.6% (13th in 11-12).
I'm not saying it is impossible that some of the things that the 11-12 Rangers did led to a higher PDO. But considering the proven non-repeatability of the stat, it is highly likely that the biggest driver is luck. The 11-12 Rangers were a lucky team (though not nearly as lucky as some teams *cough* Toronto *cough*), and the 13-14 Rangers are an extremely unlucky team. Not really because of raw PDO data, but rather the situational timing of the peaks and valleys of the stat.