I'd like to see better moderation systems. Moderation done by people who are actually good at it rather than just upvoting or downvoting comments depending on whether they agree with them or not (moderating the moderators). Ways to mark comments as duplicates so they are all grouped into one bundle. A way to avoid the "first posts" effect, where the earlier posts are likely to be the highest rated regardless of their merits.

Aggregators like Hacker News are already part of a solution; putting interesting articles in one place so that we don't have to subscribe to 10^8 personal blogs and fringe tech sites.