In my opinion it should be an assessed point by the FIC instructor undertaking the training with a recommendation of the actual training requirements. Examiners, obviously, have the ultimate sanction and I am in no way suggesting any reduction in the AoC standards and tolerances.
I am very much in favour of a competency based assessment - if you can demonstrate a skill to those tolerances/standards why, when safety is not compromised, should a student/instructor team have to then sit there for a required amount of time just because “those are the requirements”.
Same for all ratings - if a 2000 hour pilot can meet the standards, requirements and tolerances to operate to a commercial level without undergoing the full course then provided they operate to the level required on test where is the problem? Conversely, if your 2000 hour pilot can’t hold altitude/ heading then obviously the instructor has a duty to continue training until that standard is reached. As instructors we mandate more training where it is required - why not less when it is not required?