I agree that lack of flexibility to move on from players you don't want is the big issue with how the Saints handle the cap. They need to stop adding all the void years but that's mostly an issue with older players. But, I think all of it made sense when you wanted to keep the window open for a franchise QB and a team competing for championships. But, we have not been that team for 3 or 4 years so Loomis should have taken the cap hits earlier so they can be ready when they have another competitive team with a franchise QB.
That being said, Loomis has been slowly getting the cap cleaner, but I don't really trust him to keep doing it and I think it needs to be done faster.