If I put a div into my content, it's because I wanted a div, not a p. It is none of WP's business why.
If I nest elements like divs, it's because I wanted them nested.
If I put an into my content, it's because I want an anchor. It's not a malformed link.
If I am smart enough to edit in HTML mode, I would like to be treated as smart enough to solve my own HTML problems.
In short, I never want to "UPDATE posts" again; it obviates the entire purpose of having a CMS. I want a mode in the editor where it just smilingly takes the HTML I feed it, pushes it into the DB, and lets me shoot myself in the foot if what I need is a hole in my shoe.
