I think its overblown in the sense that both guys at the Athletic seem to think it has to be a safety. As such, there is this belief the Bills have focused on trying to draft or sign someone specifically to fill this "Big Nickel" role, rather than the reality which is the Bills try very hard not to have a big plodding linebacker on the field in base sets because offenses use spread more often than not. I also dont think the Big Nickel is this novel idea that is specific to the Bills defense. So I dont think there is this dire need to go and get Kyle Dugger just because he looks like a fast tweener, he has to be able to fill other roles in the defense as well.
I think the Athletic latched on to something from when McDermott was first hired and ran with it.
Sitting around wondering why his career peaked at 25.