I should probably add a way to flag a story specifically as a dupe, and maybe also for having had the title reworded too egregiously. Those are common problems people currently have to use comments for now. Can anyone think of others?
dupe terrible-title spam-site not-even-arguably-hacker-related
I'd go so far as including a "meta" checkbox next to the reply button, defaulting to the parent's value, which it would be considered polite to set truthfully, but maybe that's just me.
There are a handful of users that seem to only submit from 1 or 2 sites that (I presume) they are affiliated with. This is just more noise that makes skimming the /new page and promoting good stories less efficient than it could be.
Regarding titles... What about a title/subtitle option? Keep whatever title the actual article has, and a slightly smaller subtitle where the submitter can editorialize.