I think my idea is more that people can make their responses as simple or as elaborate as they like, you know? For example my own response to the body language prompt was all very simplified outlines, barely more than stick figures, just showing the gesture, but someone else might have wanted to draw "proper" humans, so I wouldn't want to exclude either.
As for the overwhelming, I'm starting to think that it may come across that way because the way I draw and respond to prompts is different-- like the lighting prompt did include examples of a face and of an abstract skull with just the planes indicated, because that were the example series of methodical light changes I could find. So there were a great many images true. But it wasn't meant to imply that anything this complicated would be required, like doing a lengthy series, but more so that people who don't want to do research for an exercise doodle could have just taken simlar light source and shadow pattern and copied that from the reference. I.e. to see an example for "light source from above" and one for "light source from th side + ambient light" and not have to do any more, but already have a starting point. Same for the moods, I posted charts with systematic emotions so people could just pick one from a chart and know how it looks like in principle and copy it in their style without having to search for a reference for how "concerned" or whatever might look like themselves. The examples and links and such are meant to save work for participants, not create it.