I see a guy who would struggle with blocks, or "the wash" as it's called playing in the middle. Teams could run at him and he's not the force on contact that he's made out to be. He's more of a wrap tackler, although improved technique could change that as he's built to be the ultimate hammer.
I would want him out in space where he can suck up a whole area of the field, using his speed, agility and quickness to evade blocks and bust up that side of the field. I think he's a natural replacement for McCarthy next year and could warrant PT immediately on passing situations.
Brown, Spence and Futch are all capable of playing MLB. We've had a # of OLBs move to MLB....in fact most of our recent MLBs started out at OLB. It's a natural progression as we want our experienced, reliable leader at that spot.
Also I hate to leave out Barrington because his tape is intriguing to say the least. He has a nice wide frame and could end up at MLB as he can strafe and move well laterally.