If Miami is serious about fixing the line once and for all, they need to use FA, with established.Linemen, and actually use the salary cap.
Stop going bargain basement in FA, with guys past their prime, just because he was once a known name on the O-line, does not make him a good linemen this time around.
Tackle at the very least needs to be fixed in FA, after that even if Miami decides to get an interior player (Like Center) early in the draft, then go crazy.