The Dolphins rely on the moonball and the first read being wide open by 10 yards. Take those 2 things away and they are just another team.
Mediocre or bad teams/defenses either can't do that or don't have the discipline and patience to do it all game. So they hold them down, hold them down, then get antsy for a big moment and blitz and BAM! 85 yard moonball to Tyreek and all that work to hold them down all game is undone.
The great teams with great defenses have the patience and will not allow the moonball or the quick read, which throws the Dolphins off. Great teams can also score themselves, which puts even more pressure on the gimmick offense to hit a big play.
the Jaguars totally choked or Miami would be 0-3.