I just hope Spence can stay healthy. His stint with the Titans looked like it was going to be successful until he got hit with the injury bug.
If he can though, he will be an upgrade from Moats / Fort / Matakevich. I'm thinking a lot of teams are shying away from signing him since he is tiny for a ILB, but in the right system he can thrive. I would assume the Steelers defense would be one system where he can be successful in (and he has in the past)