A possible exception is the need to transclude content. Transclusion is not a core feature of federated wiki, however we can transclude paragraphs, sections or entire pages using the about-frame-plugin.
The entire purpose of transcluded content is to enable the information to be held in one place and rendered visible in many other places in wiki. Editing a forked copy of this content is the last thing we want to do.
Adding this feature, though a new plugin, or as a temporary hack with the about-frame-plugin, should come with a DSL that allows you to specify which content you want to transclude, which