Well, they run a LOT. Grinding 2 runs a day, 70+ per week isn't for everyone. If you have the horses, it works wonders and you can be a perennial top five program. If you don't, kids will bail.
Over the past year, they've had a stud kid outright quit running (Puhl) before track, and one of their other runners (Boyd, the only junior) deal with repeated injuries.
But one, Ackley, just won a state title & finished 5th at Champs Nats, and there are always others who seemingly come out of nowhere and run 9:40 (Kafka).
Again... high mileage is definitely a double-edge sword kinda deal. If he can get kids to buy in to his program, they can rebuild. It just doesn't sound like it's happening with the crew he has right now.