Brandis has released the exposure draft of the changes to the RDA. The main problem is that the new defence (formerly 18D, now subsection 4) is now so broad that that it totally nullifies the prospect of any prosecution, no matter how egrerious the vilification or intimidation.
At a minimum, the proposed amendment will need to restore the previous qualification to the defence that the comments were made "reasonably and in good faith". Otherwise he may as well delete the entire section and be honest about his intention to gut the Act.
Here's a link to official request for comment on the exposure draft, with links to the proposed amendment.