As Mr. Seager rightly points out it is very unlikley that the JAA will scrap the CQB because someone has released a batch of questions. There are a few websites offering feedback that have been gained in the age old way of people remembering questions when they come out of the exam hall. Add to that the torturous method that the JAA approve questions by committee, the length of time it would take to get a years worth or questions just doesn't bear thinking about.
There is no substitute for learning the subject. If you try to memorise questions alone you
will fail. Guaranteed.
What feedback can provide is getting the "feel" of how the the questions are worded in euro-english. If you practice enough with feedback you start to recognise certain patterns and in certain cases be able to pick out the correct answer before you have finished reading the question. Dont forget, though, the devious b
ds at the JAA & CAA know this and will go out of their way to try an trip you up. Caveat Emptor.
On saying this, my own experience is that feedback does play an important role in getting through the exams, just be careful not to rely on it as some sort of "magic pill". The exams require a bucket load of hard slog.
The argument as to whether it is relevant to being a commercial pilot is pointless. The authorities have decided it is, so we just keep jumping through the hoops until the rules change again and the goalpost are shifted once more.