I'd suspect the reason he made no comments about soy has to do with the fact that he did not look at people who typically consumed it. He specifically avoided the cultures we associate with soy (Japanese, Chinese, etc.) because they did not fit his criteria for cultures to observe.

Also, nowhere does the WAPF say that vegetarian diets are necessarily unhealthy. They make the assertion that some individuals are not suited to them based on genetic heritage. That stands to reason, since human beings at one point lived in very small geographic ranges. If nutrients were widely available, why would the body continue to make them? They believe vegan diets are unhealthy, which puts them in line with Dr. Price, who could not find a healthy culture living completely without animal foods.

Perhaps Dr. Price never mentioned cholesterol (I'm still in the midst of reading his book), but many of the foods he used to improve his patients nutrition, such as butter, inevitably contained cholesterol. If they have data showing that cholesterol is not a negative entity, they should share it. (And they are not the only group which believes it is important.) It would be a shame if any organization refused to continue to research after starting with a base of information.