Or maybe he's just the type of guy they want here, as they've shown repeatedly with guys like Hyde, Poyer, Von, etc. And they know with Tre out and our safeties aging, they need a linchpin-type back there to continue helping ALL of the DBs grow. Doesn't have to be about Elam, though maybe it is in part.
Of course, the biggest reason they got him is to make the DB corps better.