Practically all NFL players are better than any college players, so basically all professional players are good regardless of team.
Good teams make the playoffs. Dallas has made the playoffs three straight seasons. Dallas has a good team.
Both of the above are irrelevant.
Better teams maintain an efficient roster of players, who work in unison and make as few mistakes as possible consistently. Efficiency and consistency are important because the teams that do not deviate the farthest from their ultimate goal advance further than their peers. Each season, the best team is the most efficient and consistent.
@Coogiguy03, please give your thoughts beyond that of simply good players and good teams.