I'm generally a fan of Pythagorean but I would think +/- 3 or 4 wins is not significant enough to say they are above their heads (compared to say, the D-Backs, or the Reds, who are underperforming).
Put another way - our X W-L is 60-64 and the Mets X W-L at 64-60 (also their actual record) and I'm not sure there's actually a serious qualitative difference between those two records (or 62-62).
My guess is, for all the focus on the offense and Mallee, that pitching has 100% been the difference in the times when this team has been good and when it has not. I mean, maybe the stats would say otherwise, but crudely it's safe to say that when 80% of your rotation and 75-88% of your bullpen has cratered, that's a bigger problem than Rhys Hoskins' BA with RISP. We were leading the division and doing fine back when Arrieta was still decent and Eflin was a potential All-Star, though the offense also carried Nola.
It's just that the offense living up to or exceeding its potential is their only real path to wins.
(I mean, having Jason Vargas pitch great every night and having Eflin return to his April form would also do the trick, but seems less likely. I think the bullpen has been pretty solid lately but they still can't protect every tie or one-run lead, whether it's 3-2 or 6-5.)