I just found the whole thing to sound...Ruskellian. Bring in two players at totally different positions and make them compete for one spot. Jeff Ireland isn't just like Ruskell, but there are some similarities for sure. Like how much the fanbase hates him. Tech Worlds is right, though, most front offices are more concerned with how a guy fits their system than what his unique skills may do for the team.
At the time, BB would have been competing with Vontae Davis and Sean Smith for a spot at corner, and Ireland had handpicked them. Though in truth, Miami has needed a good safety for a while now, and BB is enough of thumper that he should have won a spot there with the Dolphins.
That is actually where I think BB's future in the NFL lies as he gets older. I would love to see him transition to a guy who can man cover tight ends from a safety spot as he gets older. He has a couple of years before that though. (I don't actually know if any of what I just said is true, but it sounds smart.)