It's certainly a question that can be asked.
For all of the accolades, the fact is that the Cowboys offense is loaded with talent, arguably better than anyone else in the league. It's not news that they're great, it would be news if they weren't.
The part of the team that did overachieve was the undermanned defense.
And as good as last season was - and it was great - the team came out in the playoffs looking unprepared and ultimately lost in the first round after being the conference's top seed.
Going into 2017, the team looks well-stocked from a personnel standpoint and hopes are justifiably high. Barring injury, if they fail to go far, I think coaching should be brought into question.