It refers the number of short and medium courses for every long course.
Yes there are more rules, but for the most part they are rules that the average shooter doesn't need to know about. And USPSA rule changes are announced at least a year ahead of time before they are enforced, that gives plenty of time to fix issues and even have a rule completely overruled (like the production trigger pull weight rule).I think the biggest problem with USPSA (not attracting the average CCW holder) is that there are too many rules. To make things worse, the rules change and new rules are added frequently (in a relative sense). It's like the federal government creating more an more laws and regulations all the time . . . I don't know how big the USPSA rule book is now, but it's big. It's very difficult for a relatively new shooter, an experienced shooter who is relatively new to competition shooting, or even the occasional competition shooter to get comfortable and competent in USPSA matches.