Hey Tim, good question :). IMO what we need is to document Steemd API in detail. For every single method and operation we are missing:

• A description of what the op/method is doing.
• The list of available parameters and sub parameters with expected format. Now most of the documentations don’t talk about the expect format for the parameters and the available sub-parameters, this is something devs need to figure out.
• An example of the method / operation with default arguments, ideally with a pastebin link to be able to test the code with one click.

I know most of these operations and methods i could help if you want to start this process.
Some ressource that may help:

List of operations and methods https://v2.steemconnect.com/docs/steemjs Some operations description taken from steem codebase https://v2.steemconnect.com/sign