Everybody's Darling?
You have to invest into learning projectdoc.
If your authors like to invent a new document structure for each document they write and feel limited by the use of templates, then projectdoc might not make them very happy.
projectdoc leaves room to adjust documents to present the information. It does not demand to follow a defined template. To the contrary, the template is a best practice to write documents of a given kind. So adding new properties and sections and not adding specifying ever property and filling out every section is fine. Actually it is the responsibility of the author to decide which information makes sense. But if an information is required to meet the reader's expectation, the template defines where she expects it to be found.