There is no more pressing need than to find five good o-linemen and a few competent back-ups. But, every year, Grier just signs a guy or two and calls it a day. They need to finally quit stalling and just put all of their resources into building a good line. They can worry about other positions AFTER the line is done.
They're going into next season with holes on defense that will be filled with cheap JAGs because they don't have the cap space or draft picks to fill every hole with top talent. And, they also have a new DC, so the smart thing to do is to make sure that the offense can score a lot of points, since they probably won't be able to count on the defense being very good, at least not for a while. So, since Miami already has plenty of offensive weapons, the best way to help them be more effective is to FIX THE DAMN O-LINE!