Someone I know tried to get into BA but failed on the sim check - this is someone who has previously been top of the class in training, type rating, sim assessments, etc.... and flys jets for an airline. He told me that he got a call from John Monks advising him to reapply. There was a fairly full debrief about the sim check and feedback on performance, etc. My friend reckoned he must have been a marginal pass and later heard that John Monks was phoning a few people up. BUT, and its a big one, when my friend asked when he could reapply he was told he'd still have to wait the full year!!!! I don't know if what my friend was saying was true, but if so, then it seems a bit odd that a) BA are ringing people up begging them to reapply and b) then telling them they have to wait a year before doing the whole 2 days again.
Anyhow, the point is, feedback obviously IS available.