Robin:
One fact about the sixth at New South Wales which you didn't mention (and may not know) is that it was NOT part of Dr. MacKenzie's routing for the golf course. It was added a few years later by Eric Apperly, who designed Newcastle GC and redesigned several holes at NSW. (In fact, if I recall correctly, NONE of the par-3 holes at NSW are Dr. MacKenzie's.)
In MacKenzie's routing you went right from #5 to #7.
One is tempted to say that the green on #6 being uninteresting is the result of MacKenzie not being involved, but of course, he was not around to see any of the other greens built, either. He left the construction there to the club secretary of NSW who, let us say, was not as talented in construction as Mick Morcom and Alex Russell. MacKenzie was only in Sydney for a few days, and the site at La Perouse wasn't even cleared at that point.
P.S. I think it's a better course than Brian Phillips does, but I agree with you about the tee shot on #15. But, that's the trade-off for getting to play #14 in its present form.