Ehmanta, there's a lot of misinformation circulating about the Westsail 32 design. But even the article in your link says that Bill Crealock modified Atkin's Thistle/Eric design.
I can't cite a definitive source, since my info was conveyed to me verbally. All I can do is relay what Bill Crealock told me, in person. Quote: "The Westsail 32 is not my design. I modified one of Bill Atkin's designs for construction in fiberglass."
Certainly he deserves credit for the work he undertook to make it possible to build the boat in fiberglass.
But he was a humble/modest guy, and seemed to be sensitive to the fact that he was being given credit for a design that wasn't originally his.