I'm always careful about those style of comments, but not nearly as draconian as Denny on the "thou shall not".
I tend to approach it as "The overall hop aroma is lacking. Consider adjusting/using late hop additions to alter this". or "This beer is distractingly fruity. If your fermentation temperature was 70+, adjust it down to the mid 60's to avoid extra ester generation or switch yeast strains."
In other words I always couch those comments in such a way as to avoid "I know you did wrong and will now mandate to you the fix". Cause man alive, if you take a stab at correcting someone's process/recipe without knowing it, you're setting yourself for a world of being discredited when you guess wrong.