An awareness of "trends" in this case just might have prevented the accident had they been recognised in time and acted upon. The AAIB report is a dismal litany of indications that, once put together, give a clear indication that all was not well with CM's approach and attitude to his flying. How the instructors hid behind that pathetic excuse for not checking his licence is beyond me. Had it been checked properly and followed up then perhaps the subsequent brouhaha and further investigations might have changed the course of events.
Perhaps the inquiry will highlight such matters in a way that the AAIB cannot.