It would be very useful if FME could manage common parameters in a similar way to Database or Web Connections.
Many of our workspaces use the same (private) parameters, when authoring a new workspace we need to recreate or copy the parameters over from an existing workspace. If the value of that parameter changes, then every workspace needs to be edited, whereas with a web connnection one can simply edit the connection in FME options once, and be done.
This can also simply the moving of a workspace though the different DEV, STAGE, PROD environments in FME Server. A common issue we have is a private parameter that points to an internal REST API endpoint, and of course we have different endpoints for the different environments, and that parameter does not always get updated when promoting workspaces to the prod server. To prevent this, the "named parameter connection" would be pre-defined on the different FME servers with the appropriate data, and the workspace would remain unchanged between environments.



