Thinking more about this, creating the following clip with the name "section" is an easy way to create sections without having to change the default empty epub:
Simply highlight everything between the opening and closing body tags (not the tags themselves) and hit the section clip button (that a user could create right now)
Code:
<section epub:type="" role="" aria-labelledby="">\n\1\n</section>
And then you would have to fill in the epub-type, the aria role and of course the id of any heading associated with it in the provided attributes.
That should speed things up without changing the default empty epub3 xhtml file. And is something very simple that can be done now.
Thoughts?