Having gave away my Performance/mass feedback when I sat them to probably 40+ people and to around 100+ from pprune I found only 4 people who in turn helped me, you could say its pre exam nerves or perhaps its just that in my case 95% of the people Ive helped dont recipticate. As I said at the top of the post I want to create some new feed back based on new question because as you rightly said they do change the questions and it would be nice for everyone to recieve the new questions.
Not everyone has loads and loads of feedback and do have to work for the exams in a blind fashion.