Issue resolved now. I had multiple emails going with both Accor Plus and the hotel directly. I suspect the Loyalty Lobby article and John reaching out directly to his Accor Plus contacts in Singapore is what finally got this resolved. So I've managed to get amazing value out of the free night of over $1600 AUD!
There are still some things that are off though. Raffles Bali requires a two paid nights to use the free night. That exclusion isn't covered on the Accor Plus website. Not an issue for me as it's a 5 night booking.
I had intended to part pay with points. Now this is actually mentioned on the Accor Plus website, but during the booking process it out rightly says you can, but when it comes to the payment screen there is no option to pay with points
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Not a major issue as I just split the 5 nights up into a 3 night booking paid for plus the one free night and a two night booking using points. Luckily for me, this was roughly the split in points payment I was aiming for anyway.
So in short, lots of just made up stuff and inconstancies, but stunning free night value to be had. This literally has more than paid for the cost of my platinum Amex which is how I have Accor Plus and the free night.
I can't see this lasting long term though. Suggest making hay while the sun shines.