I somewhat agree and disagree;
I'm not sure how many of those advanced features are worth the effort of developing -
fewer than/more than: I don't see the benefit of this except for threads that are really active, which easily could include slight flame wars and off topic discussions
karma points: perhaps useful
excluding new users: don't see the point - throw away accounts are popular here and tend to come up frequently - I can't think of a single scenario where I would ever want to filter threads like this
including list of users: somewhat useful, if going to a users profile and filtering by a single user wouldn't be good enough
the only thing I could see as a useful advanced search option would be url filter to find posts about certain domains.
Granted these are just opinions on how I would use a HN advanced search feature; so my opinion could be part of the minority.
