Just out of curiosity, whats the templating engine behind Plaster with TemplateFiles?
It looks very much like Jinja2 and while useful in the template module after playing with Ansible I feel that there could be potentially things made that could make it better…or perhaps a wrapper made around Plaster that would make it more streamlined.
In any case, any doubts that I had about PowerShell not being able to template things by itself is now gone 
Many thanks for any help