The Dolphins ranked 32nd.
The Dolphins ranked 30th in cushion as well. So even before the snap, the receiver that was to be targeted didn’t have as much space as some teams generated. Again, this isn’t essential, as the Packers, Bills, and Browns all were bad with pre-snap cushion as well. But they were able to get separation with the combination of receiver speed, offensive design, and quarterback’s read of the defense.
Another thing that’s capable of being calculated is “space erased” – a metric which takes the pre-snap cushion and subtracts the separation at time of catch to see how much space the defensive player in coverage was able to erase from the receiver.