In November 2017, Old Trinity Grammarians' Association president David Baumgartner wrote to the school's leadership, accusing it of being too preoccupied with high ATARs, fundraising and building projects under Michael Davies' leadership. Baumgartner said the school needed to return to its focus on the "holistic development" and wellbeing of students. He said that there was a "resurgent undercurrent of frustration and anger" among the school community. "There is too much inward focus on things like buildings, fundraising, marketing, ATAR excellence, Cambridge schooling program, etc," Baumgartner wrote in his open letter which made its way to hundreds of parents' inboxes. He said he was also disappointed by the school's treatment of many respected and revered teachers. "The constant change of staff and the disrespectful way in which it occurs seriously concerns me," he said (it was revealed in 2018 that 152 staff had left the school since Davies became headmaster). Baumgartner, who is also a former parent at the school, warned that the school should not be run like a business and suggested that its culture would start to break down.