No mention of intensity for the specific 'workouts' other than the Tuesday one with 800 for time, etc. 2:42 would not even be a top 500 time for middle school girls on milesplit last year so I am guessing not a time trial. Was it her mile/1600 pace? A 1600 5:24 time is not outrageous for a MS girl, about a top 30 time in 2017.
In simple Daniels vernacular, she is running mostly Easy (E) pace runs for time but we have no idea the intensity of the specific workouts (I, R, FR, T) or what her easy pace even is. What are the 6-8 x 800 run in? That makes a difference.
The amount of time/mileage at E pace seems heavy. Vigil says middle school girls should be running roughly 25-30 miles a week (20 mpw for grade school, 30 mpw for junior high). This looks like 40 mpw if I were to guess. 3 hours alone on Fri-Sundays. Assuming 9 min pace, she's doing 10 mile long runs (25% of weekly mileage).