Defensive Playbooks

I do have a few minor issues with the defensive playbooks. The first is the terminology. I was very confused at first about quarter defense. Generally a nickel, dime, and quarter is 5,6,7 defensive backs. It seems in this game "quarter" is a 3DL version of the nickel. That can be confusing. I removed all quarter plays from my custom playbook thinking they're going to be mostly prevent type plays.
The other thing is the play diagrams. The diagramming, I find a bit non-standard and confusing. I am loathe to use Madden as an example, but the play diagrams there were easy to understand. Zone was a line going back into a shaded region. Pass rush was an arrow going toward the line of scrimmage. Run/gap was a forward line without an arrow. Everyone else is assumed man coverage. Here we have double circles and squiggly lines that make the play hard to decipher. And while some have conventional names like "Cover 1", some others have nicknames that aren't very descriptive. Also apparently double circle is a zone. Okay but what zone? There's no arrow or direction indicating whether it's a short, deep zone, middle, sidelines.
The other thing is the play diagrams. The diagramming, I find a bit non-standard and confusing. I am loathe to use Madden as an example, but the play diagrams there were easy to understand. Zone was a line going back into a shaded region. Pass rush was an arrow going toward the line of scrimmage. Run/gap was a forward line without an arrow. Everyone else is assumed man coverage. Here we have double circles and squiggly lines that make the play hard to decipher. And while some have conventional names like "Cover 1", some others have nicknames that aren't very descriptive. Also apparently double circle is a zone. Okay but what zone? There's no arrow or direction indicating whether it's a short, deep zone, middle, sidelines.