Have you considered adding a slight cost for submitting articles? (perhaps 2-5 points of karma?) There's a reward for submitting anything first that other people are likely to submit, but no cost, so the new page is often clogged with industry buzz that drowns out more substantial submissions. Many excellent article fall off within an hour, and then they can't get reposted.
Having more articles on the front page that aren't based on a scramble for duplicate-submission karma would probably improve the overall discussion threads, too; those posts tend to draw a lot of shallow comments.
It would also help with spam. Win win win.
I also wonder what percentage of upvotes for submissions comes just from duplicate submissions - maybe those should be counted differently (or not at all)? If the front page is already full of threads about some news about Apple (or whatever), being first to submit a redundant (but distinct) post is disproportionately rewarded, yet reduces the signal/noise ratio even further.
Having more articles on the front page that aren't based on a scramble for duplicate-submission karma would probably improve the overall discussion threads, too; those posts tend to draw a lot of shallow comments.
It would also help with spam. Win win win.
I also wonder what percentage of upvotes for submissions comes just from duplicate submissions - maybe those should be counted differently (or not at all)? If the front page is already full of threads about some news about Apple (or whatever), being first to submit a redundant (but distinct) post is disproportionately rewarded, yet reduces the signal/noise ratio even further.