So things have gotten weird. I should have left it, but stressed about getting from Amsterdam to Helsinki if the flight was cancelled. In hindsight we should have just adjusted our internal itinerary and finished in Helsinki.
I spoke to a nice guy in, I'm assuming, the Fiji call centre.
He completely misunderstood me and completely changed my entire route home.
Instead of Finnair - AMS - HEL - SIN he booked me on a cash fare from AMS - SIN on KLM.
I toyed with the idea of leaving it for about 15 minutes, but then realised he also removed my QF Award from SIN - BNE and booked me in C class.
I know that all seems like a win, but I'm still concerned QF may flag it at some point, so trying to get it back to my original routing so I can at least look like I did everything possible to keep it a Oneworld Award if something goes wrong.
Also, KLM 777 Business is trash.
That all said, looks like calling the Fiji call centre at the moment means you can pick whatever flight you want in whatever class you want, and they push it through for full fare ticketing without a care in the world...