it is actually necessary to have a case study, its in the syllabus for a reason you know...... it is technically examinable though, it would usually pop up as an essay question. but i guess if you cover your ass on everything else nad can answer the otehr essay question t(working onte hpremise that it is one fo teh essay questions) then it is alrite.
last yr i did have a case study, it was indonesia, i was so fucking tired so i didn't bother to learn it before hte exam. i was gambling there that i could answer the other essay question instead.
but just to be safe, you should have a case study!! plus its still early days, you have time now to read up on one whereas i basically ran out of time.
i would advise that you jsut don't get a case study out of the textbook, but do extra research and add more detail to your essay, most HSC guides, textbooks and cribs appeal to the lowest common denominators in the market, because the information is usually simplified and dumbed down, detail is not worked thru and basically its a capitalist money making scheme feeding off the insecurities of angst filled HSC students.
or maybe i am just being cynical......