Yes his earlier plans with getting them tons of endurance didn't work out quite as well, one of the backdrops was related to the altitude house.
It wasn't the training that didn't work, many of them simply peaked. The altitude house proved a tough experiment because many of the runners became sick, their bodies weren't able to handle big altitude adjustments. It hindered their training, and just didn't work out. When the original group lived there, Dan Brown was the only one strong enough to keep pushing his altitude, and spend more time in the house each day. It also was hard for some of the runners cause they were starting families, getting married, but yet had to live in the altitude house, sleep there, etc.
Nike has given him great support so he has attracted some of the best out there to be coached by him, especially with his success with Rupp. The HS girl you're referring to, just to clarify is Caitlin Chock. Caitlin was quite talented, but contrary to your implication Salazar actually made the right decision with her. She was way too thin and did indeed suffer from an eating disorder. So Salazar had her race a few times and realized she really just needed to back way from it and focus on her health. Salazar's team helped take care of her for a while, and she got her health back together and retired from pro running.