There are probably 200 coaches in the NCAA (division 1,2,and 3) that could get the same results at NAU.
Not only did he inherit an NCAA winning team, he was there with Heins to see exactly what Heins did. That diminishes his "legacy" in my view because he did not build something but rather inherited it.
He benefits from being in the best running city in the nation, a hotspot where even the pro runners go to train. It's also the school at the highest altitude.
If you get sub 9 athletes in the 3200 and put them at 7,000 feet of altitude, they are going to run really fast in the 10k. He was nowhere near as successful at Georgetown.