Does Gase make mistakes in play calls? Absolutely....
But his starting QB has missed 23 games over his tenure here. He has had the unfortunate pleasure of having Matt Moore, Jay Culter, and Brock O as QBs for those 23 games. He is 10-13 in those games. Go check most franchises record with their starting QB goes down. It aint good. With an average as can be QB in Ryan Tannehill he is 11-7.
Gase calls his games based on many things, his opponent, his personnel, etc.
You see, when you have a patchwork offensive line, a QB that can't throw past 5 yards, a defense playing well at home against a rookie QB, you call the game exactly the way he did. Extremely safe, don't make mistakes, and hope one of those short passes someone makes a play. He is not perfect by any means, but for anyone to destroy Gase for calling nothing but 5 yard passes with what we have right now, needs to brush up on their football knowledge.