I appreciate your concern on the issue but just to note... this "updated policy" is pretty much
DCL's standard protocol (for dealing with onboard illnesses, like norovirus, covid, stomach bug, etc.). I'd be highly surprised if there is anything specifically posted or emailed about it other than something specifically stating that testing and special protocols for Australia will be dropped.
Phone CMs generally only know about as much as the public, and sometimes less. They have no actual insight to any changes DCL will make until it is announced.