Underhill article: “Saints moves are telling us what they felt the real problem with the team was last season”

One offseason wasn’t enough time to fortify Klint Kubiaks system. For that system to work, you need to be two D at every OLine position. And the third string must be able to play multiple positions.
Depth and guys who can play multiple positions are needed for any system, as there are only so many roster spots. Again, this is ultimately a FO (talent) and coaching( making the most of said talent). My position is not so much that injuries are irrelevant, just that good organizations can overcome injuries and retain a level of completeness.