I think there also is issues with assuming Dibaba's workouts are related to a male athlete running similar times.
Dibaba has very good technical efficiency with her hip extension, much like Haile. She lands and unloads in a very good position. It's weird to think of, but her raw strength is actually not very high compared to guys her same speed, but her technical efficiency is much higher. Someone who may be comparable is perhaps Shaheen, so lets look at his workouts:
AM 4x1600m (3:56-3:59) 4:30 rest
PM 2x5x300 (38 avg) 50s rest -5' rec
Well, who can run 4xmile faster than their 3k, then come back to run 2 sets of 5x800s at near their 600 PR?
That's what you get when you have runners with high level efficiency doing hard workouts. Slightly different than "I had an 4:08 athlete run this XX workout".
4:08 athletes would run 4xmile in 4:18s and the 300s in 40s. I don't think they can do that either..
Where did you get the Shaheen info from? Sounds like total BS. I read that just before he beat El G in the 5000 and ran 12,48 he ran 2x1600 with 10 min rest in 3:57,58. He was scheduled to run 4x1600 with 2 rest in 4,06 but when he ran the first in 3.57 Canova changed the workout.