Chemistry and leadership right? Even though word on the streets is Dak has great leadership attributes.
Yes.
Amassing talented players is important, of course, but having a person who can galvanize the talent around him, to believe in the process, and to pull in one direction is just as important. And it doesn't always have to be the QB.
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In the early 90s, Cowboys had one such player; Michael Irving. He was the spiritual leader of that team...yeah, E. Smith, Novacek, Harper and Aikman to a lesser degree. These were mainly just very good players. But Michael was the guy that fired up the whole team. And once they start winning it got easier to get excited about playing...and it steamed rolled, 3 SBs in 4 years.
Novacek said similar thing in an interview few years back.
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Currently, the cowboys have no such person, who is charismatic enough to be a real leader. Everybody is about self, and the next contract.