Miami has invested in Reshad Jones and T.J. McDonald but they still are hosting Kenny Vaccaro today. Signing him, although not likely now, would give Miami some flexibility on the defensive side of the ball.
If you are one of those people who look for every single visit as a dot to dot numbers game for kids that when connected form a bigger picture than you could have fun with the Vaccaro visit and connect the dots like this: Vacarro allows Miami to move McDonald to linebacker, linebacker allows Miami to draft a quarterback instead of a linebacker in round one, which means they could be moving up for a QB instead of sitting at pick 11.