It looks like Captain M is right then: Simple incompetence on Airservices' part. A 'be seen to be doing something' proposal that's doomed to fail.
“Why does not AsA publish their internal Safety Report on the accident with full voice transcripts?”
Because under the TSI Act they are ‘protected’ and under the control of ATSB, with heavy penalties for disclosure.
What provision, precisely, of the TSI Act prohibits the ATSB from publishing ATC/Centre recordings? There are 'live' feeds of ATC/Centre comms on the internet.
And if ATSB can publish partial transcripts of comms, it can publish complete transcripts. But the problem with transcripts is that you don't know whether errors in them are errors of transcription or errors of the people communicating. And a transcript can never fully convey some of the nuances in comms that provide insights into the state of mind, levels of stress etc of those communicating.