You have hit on several unknown factors that will determine level of success in the coming season. Consistency and minimizing impact of injury/negative incidents are key to surviving the season and advancing in the post season. Other unknown factors are whether the team will bond, and have the chemistry that leads to ultimate success, and most important of all will they have mental toughness, as individuals, units and a team. It only takes the addition of one inharmonious ingredient to destroy a recipe, and there will be over a dozen new faces to integrate into the 2017 squad. Much as I dislike Polian, he is not wrong in asserting that the Patriots are not invincible. However it is an easy platitude given how hard it is to put together a SB winning team in the first place, let alone a perennial post season competitor. He also took the easy way out of the original question, by focusing on a commonplace observation about a team that stands between the Bills and any immediate success of their own. He would have gained much more credibility if he had provided some insight into the real challenges faced by one of his old teams. Instead he took the click-bait route.