You can clone with
Instead of editing Google Analytics: change UA-XXXXX-X to be your site's ID. would be useful if an option like -G <UA-XXXXX-X> which would add the required ID while generating the index.html ?
Google Analytics: change UA-XXXXX-X to be your site's ID.
Not sure about this, I'm vary of having too many questions/flags.
Me too. I don't think it's necessary if it's used in only one place. I think it should be used twice at the very least to become an option.