Dynamic Page Item

I have the issue that I would like to present a dynamic Page Item, meaning title and description will be supplied at runtime. If I understand correctly from the other issues, the manager has to be created as an instance variable. This limits my abilities as I cannot reassign the rootItem or the title of the Page Item once they have been created.

So I'm not sure if this is a feature request or maybe there is a way to supply those things later. Would appreciate some guidance.