One has to ask the question, why are we writing reports at all! In the modern day its probably part of a backside covering exercise to prove we are not responsible for some unforseen consequence in the future, but traditionally, it was to justify pass or failure and more commonly failure. My experience in the Military was that very little evidence was required to pass a candidate, but to justify a failure, a considerable amount of "evidence" was required. consequently, instructors would start a portfolio on any dubious candidate from an early stage. If they made good, it was easy to dismiss, but to justify a failure it required considerably more documentation to convince the board.
As instructors we may wish to report items for other instructors to concentrate on; these are unlikely to be positive items. If the student is up to speed there is little to report, "Satisfactory" says it all.