For starters, let me say that I think the word "unique" is perhaps the most misused word in the English language. If you mean "unusual" or "different", just say so. Unique literally means one of a kind. Truly unique features are very rare in golf course architecture, but then I suppose all courses are unique, sort of like my finger prints are unique. There are not degrees of uniqueness anymore than there are degrees of pregnant.
Now to my next rant. It seems to me that there is too much fascination with new and different and not enough appreciation for "tried and true". That applies to much more than golf courses, restaurants, for example. Give me an established and proven steak house over a new fad with the latest creation from California everyday. Don't get me wrong, I am often excited when I encounter a course, a hole, or a feature that is unlike anything I have seen, or rarely seen, before. But, I also appreciate what I call "pure golf". Some holes are just worth repeating, and I admire an architect who can, and will, repeat a great feature. In the case of Raynor/Macdonald I expect to find several often repeated holes. What I find fascinating is how they manage to repeat the hole on different sites. It's sort of like my reading of history. I have probably read at least 10 histories of the Battle of Gettysburg written by as many historians. Of course, I know how the battle will come out, but it is interesting to see how different historians treat the same event. I am not looking for someone to come up with a "unique" outcome. OK, actually I keep hoping!
Pat, I don't really know what "quirk" means exactly. I suppose Astoria qualifies as quirky, probably even unique. Some quirk, like Astoria, are pretty cool. Others, like trees in the middle of fairways, or even greens, are just ridiculous.