There are too many quality additions, too many opportunities for a breakout season, for this ranking to remain the same.
Last season the Cowboys lost their most promising veteran free agent D-lineman before the season even began. They lost Hill just when he he started coming around. They even lost Gallimore before the end of the season.
I have to add that they had a new defense, new DC, no minicamps, no training camp, no preseason games....
The defenses that suffered the most in 2020 were the teams that were going through the most changes. thee was just no opportunity to put it all together in time.
I've said it before, anybody trying to evaluate the Cowboys based on anything that happened last season has already rendered any observations irrelevant. By the end of the season, the D-line starters included a 3rd round rookie draft pick, a guy that did not play football for almost five years, and a guy that retired once the season was over.