Yeah - it's a shocker, though not really their fault either, at least to a not insignificant degree). Refs are being put in this position by incompetent administration I'm afraid.
If you change something, make it clear in the off/pre-season so officials & teams can prepare for adjustments. This mid season drastic change shit is just putting everyone in a bad position and is so f**king frustrating to watch (I can only imagine how frustrating it would be for the players).
Good administrators would plan ahead with foresight and have a coherent strategy with changes, and communicate this effectively to all stakeholders (players, coaches, officials, media, fans). The NRL doesn't seem capable of this.