Joe:
Clearly, there are individuals whose mark / contribution is limited because they didn't design that many courses. There are many examples -- Crump, the Fownes, Hugh Wilson, etc, etc. In some cases that's helped the courses because there are few, if any, other courses to compare / contrast against.
My point was John made his original statement about C&C layouts being all formulaic. Tommy's response was a good one IMHO -- how many of the layouts has John actually played? I believe the personal experience is necessary and I also believe that playing a fair number of courses adds to one's credibility to make comments on any overlaps, plusses, minusses, etc, etc.
John -- no doubt when someone starts designing a mass of courses -- let's say greater than 15 you have to watch closely and see if they are simply pushing them out like McDonald's pushes out burgers.
No doubt -- some of the older architects had more unique and impressive sites to work with. It also helps that their batting average was limited in the amount of courses (times at the plate) they did. The top tier folks who do "mass" design can often fall prey to repetitive and tired concepts. But, one cannot assume that as both Nicklaus and Fazio, to name just two, have created winning layouts throughout the breath of their design careers. It takes the effort to play them to find out which ones are formulaic and which ones are ground breakers in originality and freshness.