Once upon a time Hacker News was called Startup News, it was a place to share links and discuss between people passionate about startups. Good links and discussions stayed around for days, every aspect of startup life was discussed.
Sadly that time has long gone. As I write this, on the front page of HN there are maybe 4-5 stories out of the top 30 that relate to startup topics.
Articles relevant to startups are being pushed out by generalist tech and programming articles that are better served by the many many subreddits on these topic. While it's open to debate whether these are on-topic on Hacker News or not, HN is far less about startups than it used to be.
Many contributors to HN don't even see it as being about startups anymore, even contributors who've been involved in HN for over a year are talking about it as a tech or programming site. The startup stories that reach the frontpage tend to be on technical topics, the non-startup tech audience of HN now means stories focused on the non-technical aspects of startups such as marketing and raising money make it to the front page far more rarely than they once did.
I remember complaining at one point about the number of stories about A/B testing on the front page. I wish I could complain about that now.
Take a look at Gabriel's Ask YC archive - it was created to address the startup questions that frequently turned up on HN, for many of these topics I can't recall when I last saw them discussed on HN.
There are a hundred social networking sites that serve the tech community from proggit to dzone, what differentiated HN was the focus on the startup community. That focus is dying out, and we're becoming just another tech social news site.
I don't think we can make HN be more about startups again, the audience has changed too much for that, and it wouldn't be fair to the non-startup tech community that's come to rely upon HN.
So instead I'd like propose that HN stays as it is, but pg creates a new HN called Startup News, which has startups at it's heart as HN once did.
You seem to dislike the non-startup material, yet those older members who were around at that time must have liked the discussions sprouting from the "more generalist tech" posts, else the name wouldn't have been changed.
Thus, I reason that it is not the range of topics submitted that is the problem, but the quality of the posts and subsequent comments. I believe the older members valued intelligent discussion on any topic (centered around tech-startups).
I think a solution should concentrate on improving the discussion of topics, promoting those that spark the "best" (for some definition of "best") conversations. Therefore I suggest:
More liberal use of the downvote button by those that have the ability (over 500). Number and score of comments should play a (larger?) factor in ranking stories. More aggressive moderation of "off topic" or vacuous submissions and comments.
But over time people took it to mean hacker in the technology sense of the term, and thus we now get reviews of Ubuntu on the front page, which you would never have seen a few years ago.