For Malcolm Jenkins' first three years in the NFL, he was playing out of position. In his rookie campaign he was playing corner. Unfortunately, that position wasted Jenkins' amazing blitzing ability and run stopping acumen.
Then in years two and three, Gregg Williams and the Saints placed him in deep center field and asked him to read the quarterback's eyes and react. That was something he was never truly comfortable with, and it showed. He struggled to some degree with that.
Finally, Jenkins has a defensive coordinator wise enough to put him where he needs to be. On most downs, Jenkins will line up approximately 10 yards from the ball still at safety. But in Spags' defense, there is no distinction from free safety and strong safety. There are simply two safeties (sometimes three in sub-packages).
This will allow both Jenkins and Harper to play pass first and come up quickly for run support. And it will make their safety blitzes more effective.
In sub-packages, Jenkins will be used as a nickel corner sometimes, while also being asked to blitz and play zone coverage on the back half.
For a player with such a variant skill set, it will be freeing, one would think, for Jenkins to finally have a coach who knows how to use him.