Justicar Araya battle thoughts
The same problem happens in many story boss fights – depending on your graphics options some of the damage AoE could become completely invisible (or extremely difficult to see). Then players die easily, come to forum to complain and there will be endless arguments with those who have different graphics settings and can do same fight much more easily.
Reusing puzzles introduced earlier in the instance is not new, either. One that comes to mind is Hidden Arcana, particularly the Glint section. You first learn a mechanic, that mechanic is shown in a slightly different way, then you kill a boss with it. I didn’t realize originally that Araya’s trap was the exact same pattern, just shown from a different angle. It might be enough of a difference for people, though.