If I had to make code suggestions, I would say that discussions on a single post get too long before anything is resolved. There seems to be no point in commenting once there's a certain number of comments, and so discussion tends to sort of stall out. I'd be interested to see what the distribution of # of comments on high karma posts looks like and whether there's a specific number of comments which seems to function as a sort of glass ceiling. I also think that as time goes on things get pushed down the queue and become invisible. The fact that no matter how brilliant your idea is it's basically got a week in the limelight and then will be forgotten forever isn't super conducive to using LW to seriously discuss difficult problems.

Is this an example of a proposed code change that you feel would solve this issue?