A bit more here from "Stars & Stripes" including some statements from a Tech Sgt spokesman for the Thunderbirds:
"However, Tech. Sgt. Christopher Boitz, a spokesman for the Thunderbirds, said the crash was not the reason Leavitt dismissed Heard. He said Leavitt had concerns that Heard’s leadership style was resulting in unnecessary risk within the Thunderbirds’ demonstrations, “which eroded the team dynamic.”
“We are on the road together more than 200 days per year, executing flying operations with absolutely no margin for error,” Boitz said. “As a result, absolute trust and teamwork in both our professional and personal dynamics are foundational to our mission.”
https://www.stripes.com/news/air-for...dence-1.500053