swim4, I didn't mean to slight Lerew in any way, and I doubt she did either.
Most of the coaching mid-season in diving is cleaning up technique, and different coaches excel at cleaning up different parts. Some might be great at teaching entry, some might be great at smoothing out twists. After working with her own coach, who might be better at some aspect of this, she'll go back to Lerew who will work on whatever his forte is, and then sort of put all of the details together. That is what the best head coaches do. They take what the divers have learned from other coaches (most divers you'll find have had MANY coaches) and put it all together to get the best overall dive. This cleanup of technique is exactly what they need 2 months before NCAA's, and likely what she's still getting in Australia.
As an example of what I met, a guy I went to highschool with named Ryan Cook was coaching UH's USA-Diving team while in school. He was just an average diver in highschool, often was a regional finalist, but wasn't necessarily anything special. The UH diving coach is renowned as one of the best coaches in the world, and trains Nastia [RussianLastName], who is probably one of the top 3 or 4 divers in the world. Despite that, it's been reported that her coach claims that this Ryan Cook guy is one of the best callers that he has ever seen. Basically, he calls out to the divers when to break from their twists and flips to hit the water at the perfect angle/entry point.
One of the greatest coaches in the world abdicating to a guy whose been coaching for under 5 years, does it part time, and is NOT one of the greatest coaches to the world? I think that shows a little insight into the unique coaching of diving.
[Disclaimer: I am a former swimmer, and swim coach. I apologize to any divers who might read here if I have *******ized any of the terminology or theories and concepts of diving. I try to learn as much as I can about diving, because I think it's an underrated and underappreciated part of a S&D team, but I still don't claim to know everything.]