Perhaps following a CAS bust pilots should be required to complete a questionaire (perhaps in consideration of no further action) for a period of time. This might enable a more relaible picture to evolve of the casue (and whether or not moving maps would have helped prevent the bust).
That's typically what happens today. (Although not a questionnaire per se).
If you bust CAS there's two things that could happen: I'm not sure of the exact form number, but I understand that a MOR is one, and there's another form filled in if the bust warrants it.
The CAA will write to you either from the "Flight Standards Officer" or from Enforcement and
AFAIK this depends if only one (the MOR) or both forms are completed by ATC.
The data from the non-enforcement (FSO) is collated and
AFAIK is used in coming up with recommendations.
Enforcement use a different tactic