Agreed. Only after I went through a few year's worth of questions did I really begin to understand the true scope of the test. And year after year, the questions become more familiar. It is true, the same principles get revisited time and time again, often with similar questions.
After taking several years' worth of tests, you might see in which of the four categories you are weaker, comprehensive, cranio, hand, or cosmetic. If you've got more time to study, then you could concentrate on your weaknesses.