What kind updates you mean to workspace?
You can export applications and then import it to another workspace and overwrite existing app.
Workspace export do not contain applications. It contains only workspace setup, and if I remember correctly also users.
Yeah that is what I mean, updates to setup and users. We've created an environment where we have 1 development area and then hundreds of remote clients that all run the same workspace/application. It might not be often that a workspace would need to be updated but if we do need to I would like to know the correct way to do it.