Other way around. One of the options engineers receiving the mailing have is to go to the hearing and present their opinions on the settlement to the judge.
Most won't, but with 64k plaintiffs, most of them long-winded, it'll still need to be a patient judge.
What is currently private are the proposed terms of the settlement.
Those get mailed to every member prior to any judge approving or denying them, because the class members can object independently of the lead plaintiffs