Actually, cabin crew (should) adopt a semi brace position for every takeoff and landing, which can be changed into full brace within a second. Most are rearward facing. So to me, I am curious as to how they were braced (and if) let's face it, anyone can become complacent. I see crew on a daily basis in incorrect position for to and landing. I usually get laughed at for doing it properly but hopefully I'll be the one left standing if anything goes wrong.
Not suggesting that the OZ cc did anything wrong, but wonder whether there are factors on their side that may also need to change.