I made some notes for myself back in April 2019. Here are the old plans for SSB LV, MV, HV with my notes, going with week3 as the example week:
LV was 3 interval days on Tuesday, Thursday, and Saturday:
MV was 4 intervals days:
HV was 5 interval days:
When AT launched I believe they changed HV to 4 interval days and 2 aerobic/endurance days.
As I said, the Easy/Moderate/Difficult is a judgement call. For myself I simply classify workouts as either interval days, or endurance days.