Should the 'brick' hand signal be added to the hand signal document?
Signalling a brick seems to be something in the style of the rest of the signals in that hand signals document, but it's not included.
I think it could be useful to include it. People get it wrong occasionally (giving a single clap to indicate a brick). Adding a picture of the correct signal, alongside the other hand signals would help, I think.
I guess the brick hand signal may have a slightly different status than the others... Given it's described in the rules text, unlike the others. But I don't think that would be affected by adding a diagram.
Also, a separate suggestion: a hand signal for "what gender ratio are you guys choosing?" ... potentially useful from a distance.