Not drafting for the Line in the 2nd round was almost as big of a mistake as not going for Mathis. Whether they whiffed on the pick or Mathis sucked, you have to show that you recognize the problem. They still have not.
I hate playing the coulda-woulda-shoulda game, because hindsight is always 20/20, but I see one serious doozy from a few years back. In the 2013 draft, when Miami traded their #12 and #42 overall picks to jump up to #3 to select Dion Jordan. If they had kept that #42 pick, regardless of who they ended up taking at #12, they could have totally changed this offense.
What Miami selected in the 2013 draft with its first two picks (#3 & #54):
#3: DE Dion Jordan, #54: CB Jamar Taylor
What Miami could have taken had they stood pat (#12, #42 & #54):
#12: CB Desmond Trufant, #42: RB Le'Veon Bell, #54: OG Larry Warford
So, remove Jordan and Taylor, who have amounted to absolutely nothing for Miami, and add one of the best young corners, running backs and guards to this roster.
Teams are built through the draft, and Miami really shanked the 2013 draft.