Like with anything else I see that comes from the professional officiating community, I think it's important to use what they are providing as some sort of baseline and then adjust accordingly. When I did this workout last night, I actually tried to keep my heart rate in a particular zone on the 2K run instead of trying to meet that 6:20 pace (which I wouldn't be able to achieve right now).(12 sprints and ~ 6m 20s pace for 1.25 miles)... all repeated 4 times!?
In terms of specificity for refereeing, the 2km bit is a long rep
Anyway, good luck to anyone tackling this workout. Even among well trained individuals (under the age of 30), only a small minority could do this