The most intuitive thing that you will notice on this graph is how completion percentages drop as you get further down the field. If you watch your own offense in patterns on air, you will see that even without coverage completion percentages drop as you throw the ball down the field.
How does this translate to coordinating a defense? Many guys feel very safe running cover 3. But when you look at this graph you see that the windows cover three leaves are all high percentage throws.
The reason that pattern matching has become more popular in defensive pass coverage is that it can push the ball outside the numbers and down the field. No coverage is perfect, and all have their weaknesses, however in passing situations it would be best to push the ball out to the areas of the lowest completion percentage.
If you are interested in learning about a particular coverage that allows for pressure and pattern match to add to your repertoire try coach Albers' book on the pattern read 4-3 defense.