The minimum number of raters who must see a course before it's ranked was ten when I was in charge, and I believe that's still the minimum number. [Actually, it's even less ... if a course has only 7 or 8 votes, but would have made the list if three other people saw it and rated it badly, it gets ranked based on that. But that's a bit more complicated, and very few courses have ever made the list on that basis.]
Way more than ten panelists have played Royal Melbourne East.
As for Five Farms, the problem is that few if any of the panelists have played the course since the restoration, so it's still being ranked on the basis of my vote (and others) from 10 years ago. It takes some time after any restoration for any "bump" in the ratings to appear as a result ... that's true for all of the magazines, incidentally.
And for Steve L: Sand Hills was ranked 30th or 40th when it first opened, and has (deservedly) moved steadily up the list since. Same for Pacific Dunes and a relatively few other modern courses ... most start at their high point (because of the hype) and slowly fall off the list from there. Check back with me in two years to see which way Ballyneal is moving.
I find it odd that everyone has missed how Friars Head has moved up significantly, or where Nanea debuted, or Old Sandwich, Machrihanish (!), or North Berwick (!!). Surely there is some support for those subjective opinions, isn't there?