As some have surmised, there were other items, and were it not for this one I wouldn't be considering an appeal. For the disputed item, my examiner's opinion is that the way I flew it does not achieve optimum performance and therefore safety. On reflection that is my opinion about the examiner's suggestion.
My instructor doesn't seem to think it's in my interests to rock the boat. Given some of the opinions I've seen on PPRuNe I wonder if he may be right, but I feel I would be neglecting my responsibilities as a pilot if I do nothing.