Problem, not prescription
"The headline feels quiet next to the image" is better than "make the headline 8px bigger". The first lets us solve it; the second guarantees only one attempt.
Be specific about location
Reference the page, the frame, the timecode. "The middle bit feels off" costs a round trip.
Separate must-fix from preference
Mark each note. A round with fifteen equal-weight notes is unsolvable within a fixed date; a round with three must-fix and twelve preferences is straightforward.
Send once
One consolidated message. Trailing notes an hour after the round is closed roll into the next round.