I suspect you need to understand more about how Word and templates work.

Why three macro-enabled templates?
You could have QAT icons to create new documents based on non-macro-enabled or macro-enabled templates (rather than copy and paste). The icons would be linked to macros that create the documents, but those are trivial.
You may very well be able to store the content you want in building blocks rather than separate templates and could simply have a building blocks gallery content control in one template. That would require no macros at all.
- Templates in Microsoft Word
- Automated Boilerplate Using Microsoft Word
- Building Blocks Gallery Content Control