Phil
I say it depends on how the holes relate to the rest of the course, how they contribute to the routing. This involves a number of issues.
Additionally, I disagree with many's apparent definition of "perfection" as based on a reductionist analysis of the quality of the individual holes. This may apply to certain fields but when you're talking beauty there is a certain type of "imperfection" which is essential to that beauty.
Although this discussion goes back to Socrates and Plato, John Ruskin in his defense of the vernacular Gothic architecture in Northern Europe ("The Stones of Venice") made a great argument against "perfection" in the arts, an argument that Wethered & Simpson actually took up in their discussion of an "ideal" golf course.
They wrote that a course made of nothing but "world's greatest" holes would be not a joy but a heavy burden if one were condemned to play it every day.
True, some "imperfect" holes or "imperfect" features are just bad, thus the caveat that a certain type of "imperfection" -- see, it's not really "imperfection" if you're looking at the sum total of the course, rather than its component parts -- is needed to elevate rather than harm the course's quality.
Tolstoy hit the imperfection nail on the beauty head when he wrote: "As is always the case with a thoroughly attractive woman, her defect--the shortness of her upper lip and her half-open mouth--seemed to be her own special and peculiar form of beauty."
(That Princess Bolkonskaya was a hair-lip hottie!)
So: CPC 18 sounds like it fits this criteria. I liked the NLE dogleg par 3 at Pebble for this reason as well.
Mark
PS Ganton is a 10 in my book. I find it understandable but ultimately amazing that so many lump it together with Woodhall Spa. I liked the latter, but the former is the very embodiment of sublime greatness, with its bunkering, excellent use of angles, perfectly-tied in greens, and (credit to Sean Arble) grade-level architecture.
Interestingly, echoing comments on CPC and Newcastle, 18 would get my vote as Ganton's weakest hole. Bring back PANDY!