From PFF's ranking of all 32 o-lines in 2017 (Miami #29): "...when it comes to pass protection, the unit played relatively well... The bigger issues came in the running game where Miami’s offensive line struggled mightily and all linemen graded poorly. Consequently, Miami’s running backs averaged just 0.59 yards before contact, which was last in the NFL by a wide margin (Detroit was second to last with 0.96 yards) and well below the NFL average of 1.56 yards before contact."
I believe that being able to establish and sustain a strong running game is still an important key to success in the NFL. Miami's o-line sucks at run-blocking because both Philbin and Gase prefer a short pass based offense and place little emphasis on the running game, so they want "finesse" linemen. In fact, they both stated that the short pass will actually replace most of the running game. Sure, on occasion they have a good running game, but usually the RB is hit at or behind the line of scrimmage. Miami's weak o-line is consistently dominated by tough, physical d-lines, and this needs to change if they are to have success. Another year with Tunsil, Pouncey, and James is not the answer to establishing a strong running game!