Thank you Ivan for the response.
Just to clarify, I am not involving siteSync here yet, just multisite functionality, where it would be ideal to have the option to:
when creating a new website based on another website, that a new set of templates is duplicated and used on the new website, as opposed to what currently happens where the templates are shared.
As to not end in the situation where we had a site of US, made a copy of it for Australia, and then another copy for Canada.
The US website had a bunch of US-site-specific links in site footer (in the template used by all the pages in the US website),
Since the template is now shared across the three websites, now we do not have the ability to change the footer as it affects the three websites, in fact the footer is "broken" for the two other websites because it has US-specific links...
The options... create the new templates, go to every page on the other websites and switch the templates. This is work that was not expected but came out of this side-effect.
Another annoyance, users are duplicating pages between sites, and templates are crossing site boundaries to other sites where they not necessarily work well... More of a user training/education effort...