"show more comments" link not obvious
If a post has a lot of comments, the last ones are hidden behind a "Show more comments" link. For some reason, even though I know it's there, I really have to think about it each time. "I thought I replied to this... did my comment get lost? ... oh yeah!"
It would be nice to have this be more visible.
It would also be nice to have comment voting, so that the most valuable comments can be shown by default rather than just the first ones.