A grad student basically told me my site sketches were useless

I was working on a dig in New Mexico last summer, mapping a pueblo room block. I'd been making these neat, clean sketches of the walls we uncovered. A grad student from the university team looked at my notebook and said, 'But where are the rocks?' I mean, I had the outline, but she pointed out I wasn't drawing the individual stones or their shapes, which tells you about building phases. I changed my method that same day, spending an extra 20 minutes per unit to draw each major stone. The next week, it actually helped us spot a later repair in the wall that the clean sketch would have missed. Has anyone else had a simple piece of feedback completely shift how they record in the field?