I get the impression that from the way LASORS is worded there is a large element of discretion attached to the 'requirements' for the training flight, anyway. Unless there actually is a syllabus written down by the CAA which FIs must follow for revalidation flights, in which case there are FIs breaking rules all over the place...? Can anyone clarify that?
I would think it professional for an instructor to perhaps suggest some exercises to carry out during the hour, and it might be prudent for the pilot to accept the advice, IF they agree it's necessary. After all, surely it's the responsibility of the pilot to ensure he is flying safely and is in good practice. There's a big difference between the revalidation flight and a school check flight, which has implications for insurance etc.
I did some unplanned diversions for my hour.