I think Campbell is different than the others because he has shown pass rushing skills and went to Bama as an edge rusher.
I also think of past Bama ILB's that I liked and turned out to be meh, like Rolondo McClain. But those guys were also purer ILB's.
I think Campbell can be a guy that plays the run well and then could move out to edge and rush the passer or provide a gap seeking inside pass rush.
My thing, when it comes to the draft, if you can get a guy who is much more highly rated than the next guy, I'd take him. Look at the DT's. After Graham, you can make an argument for about 10-15 guys as the next best and who might be the best in the NFL. We've all talked Nolen, Harmon, Grant, Tyliek Williams, etc. as to who would be best. The kid from Toledo might be as good as any
For the edge, after Carter, it's the same. Pearce, Stewart, the BC kid, Walker, Green, Williams, et al, when the kid from Louisville may turn out the best.
No doubt, Edge and DT, are the more premium positions but if you can get a similar guy in round 2 while getting the lead at another position in round 1, that makes sense to me.
But who knows, maybe I just have pre-draft brain cloud overload.