I can agree, the first hole to come to mind was the Island, though none have been replicated as good as the original. And now that you mention it, the Cape, or even a long dogleg, finishing hole is fairly well used. Without going back and running through all the courses in Pinehurst, I would say that the majority of them have dogleg par 4 finishing holes, at least among courses built recently. The "conjoined" green concept has come into use as well (meaning greens connected by a small sliver of land rather than the double green concept seen at TOC)