The difference between him and who we have is that he has the potential to develop into a top pairing D
Eh, I think that's a bit of stretch. Based on what he's shown thus far in his career, he's a good middle-pairing defensemen and that's probably more-or-less it. If he becomes a staple on a team's top pairing, it'll probably be because his partner is an excellent #1 defenseman who can really "drive the bus." We don't have an excellent #1 defenseman, and that, honestly, is the most pressing concern for us.