Others may have equally valid views but from where I stand a good set of written SOPs will explain the protocol/procedure in clear and concise shorthand but then have an accompanying page that explains what every new pilot needs to know to complete the picture - an 'expanded' version. The former is easy for reference/learning and the latter is essential material for the newbie. The preferred dialogue should be included.
Feedback from the line is essential to keep them current and relevant and the SFI system can be used for the odd 'glitch' that means a temporary problem necessitates a variation from the Norm.
G.