I don't know that this falls to us, per say, but I think the handbook should include some best practices like "how to label buttons so people click" and content related things. Perhaps this is outsourced to the Comms Hubs?

 
https://app.usabilla.com/feedback/item/66a1da63e6847663ee3564a727eae2c3699c2674
https://app.usabilla.com/feedback/item/14323c20e5fa663ba8323dc92caa2cd005fd33fd