Despite positive steps towards introducing an R18+ rating in Australia, it won't come soon enough to save EA's new Syndicate remake from being slapped with an RC rating
by the Classification board. No reasoning is given on the Classification website, however Kotaku has been given the full report, which they've linked to in their article on the banning located here
Having a look through the report, it mainly focuses on concerns around how the player can quite violently dismember and mutilate people with the various in-game weapons, but also that it gives you the ability to "repeatedly damage enemy combatant’s corpses".
There's no word as yet if EA will be appealing the decision or planning to release a toned down version of the game similar to the low-violence version of Left 4 Dead 2.