I have been trying to imagine a kind of template for news commentary that could attempt to award productive discourse. I don't think there's an easy way around it being gamed but it's fun to think about. Something like:
* Here are several basic facts
* Here is our best interpretation of the facts given the context.
* here are interpretations that the other side(s) are putting forth, stated in their strongest form such that they would agree with it as stated
* here is our analysis of why those other interpretations are not as strong as our own.
You could maybe rank or sort these based on how many 'other siders' agree with (upvote) their presentation of the other side mixed with how much you agree with the basis of their analysis to choose your favorite sources of commentary.