You guys will be fine. You have an amazing foundation with Dak, Zeke, and that offensive line. I would be absolutely shocked if this core group of players doesn't win at least one Super Bowl for Dallas.
Quick note on the 2011 Packers: Joe Philbin was our OC at that time. We had a historically great offense that year. The week of that divisional game, Philbin's son died in an accident. He was found dead after drowning in a river, and toxicology showed that he was intoxicated. As expected, the team spent a great deal of time that week on matters related to the death: wake, funeral, etc. Needless to say, it wasn't a typical week of preparation. Philbin's loss was absolutely terrible, and it had a crushing effect on the players, coaches, fans, etc. Of course, it also likely affected their preparation and play. So that playoff game frequently falls into the "what if" category for the Packers.