I agree that it is daft to rely totally on feedback. On the other hand, I sat both PoF and Perf on Monday and found that a vast percentage of both exams, were covered by the feedback I have. I still made errors, (especially in PoF) but I made sure that they were not made by me rushing the exam. I knew the answers, but due to various reasons, I changed a few and have therefore most likely dropped PoF
Examination technique has a huge part to play in passing these papers