Me too. Also, knowing that the DOM will be structured as I intended it to be is a good thing...especially when traversing/manipulating with JS. There is an HTML5 parser that will tidy up those omissions but I doubt that will be implemented consistently across all browsers.
Leaving the browser to tidy up after you is IMHO bad practice.
A couple here from people on the team:
Be good to be able to add comments to lists/list items, just in case there's a dispute or more information is required to complete the task.
Be good to be able to ‘contract’ Lists, so you only see the title. Click on it to expand.