I have a situation where a user needs to select the relevant web connection for authentication, but as there is no means to get the base url from that web connection, they still need to enter an additional URL that the web connection should be used against. This leads to cumbersome double entry and is therefore prone to mistake, when the relevant information is currently held, but inaccessible to the workspace.
I believe it would be beneficial to have the URLs that is held in a Web connection accessible in the workspace. For Aoauth2 this would be the URLs stored in the Web services, while thing like FME Server wuld be the Server URL stored in the connection.
I would suspect that this could be an additional transformer that could extract details from a selected webconnection and extract them out into attributes within the workspace.