Overall, I'd give the Phins a B+ for their efforts. And here's why:
I'm a big believer in special teams. They account for somewhere around 33% of your success on the field. Frank Beamer at Va. Tech was one of the first major college coaches to address this, and he uses starters on special teams to make a difference. Similarly, Jerry Glanville focused on special teams during his time in Houston, and had specific players who used for special teams. The end result was that both had (and have) enormous success on special teams, and get good field position, and cause trouble for the opposition.
So, lets take a look at the three critical areas.
As it is important to the overall success of the team, Miami decided to devote some attention to it. The linebacker and defensive lineman, and even both running backs, were brought in specifically to contribute on special teams. And of course, they picked up a punter, which was a need. And that Ted Ginn, Jr pick. Jr. was clearly brought in to help the return game. If he has just a few big returns, it'll be helpful.
Miami already had a pretty solid defense returning. The weak spots were at the defensive tackle, and corner. Corner was not addressed, but the plan is to move Jason Allen back to corner, so its not all bad. Tackle was addressed through the draft.
Going into the draft, it was clear Miami needed a QB, depth at wideout, and offensive linemen. The QB they addressed. Wideout was addressed to some degree, and offensive line was taken care of. My only concern will be that left tackle spot. They are planning to move Vernon Carey to the spot, and that might work.
So, overall, they addressed the needs in all three categories, and I think that warrants a good grade.
Who the heck knows if these guys will be good or bad, anyway?