I disagree that it's the "weakest" position group. I'll take "What is Cornerback or Safety" for $1000, Alex...
Not that it shouldn't be an area of concern, and I might call it 1B. When Trysten Hill and Neville Gallimore are your anchors in the defensive interior, that's an issue. And yes, Atkins would help tremendously. I have faith that Odighizuwa will be a beast, and Quinton Bohanna will be able to contribute.
But yeah, it needs help for sure.