Then read this article. Interestingly enough, it was written before the draft and called Vaccaro our "most prized target" for draft night.
The article highlights Vaccaro's versatility and Roman Harper's limitations in coverage. It's long but a fantastic read. Presnapreads.com
Ryan is going to bring a very aggressive approach to Louisiana. He may have slackened off from his blitzing with the Cowboys last season, but his overall philosophy is one of pressure and creating pressure from different areas of the field. Ryan isn’t being welcomed by high-quality pass-rushers in New Orleans, like he had in Dallas with DeMarcus Ware and Anthony Spencer. Instead he will find a variety of different skill-sets and contributors who he will need to craft into a front seven capable of allowing his unit to compete.
Even though they could desperately use an outside linebacker to rush the passer or a three-down inside linebacker, the priority for the Saints is to re-tool and overrun and outmatched secondary. That process has already begun with the addition of Keenan Lewis, a former starter of the Pittsburgh Steelers who arrived in free agency. Lewis gives the Saints a leading cornerback, which will allow them to flip Jabari Greer to the second spot or mix-and-match him and Patrick Robinson depending on who they are trying to cover.
With the cornerback position improved, the Saints will be desperate to replace strong safety Roman Harper with a better player in space. Harper is an in-the-box safety who is awful in coverage. He is simply too slow to play in Ryan’s scheme and would be forced to blitz more often than is ideal. Even in Spagnuolo’s more passive approach, Harper rushed the passer 69 times last year, more than three times more than any other defensive back on the roster. With a player like that on the field, the Saints not only have a major liability in coverage, but they would be too predictable in an defense based on it’s unpredictability.
By the way, this website is pretty damn amazing. It's definitely for the thinking fan who wants to dig deeper into the Xs and Os of the game. There's some great articles on here, several about the Saints.
Disclaimer: I fully admit I was less than happy when hearing Vaccaro's named called on draft night. But within a few hours of perspective I was ok with it. After really looking at the pick objectively in the days following the draft, I actually fell in love with the pick. Obviously, the FO knows way more than we do and I'm excited to see what he brings to the table.