I always wonder why Hacker News is not developed as an open source project. This seems like a natural approach for such community, especially taking into account that pg has no time/interest to drive it himself.
Though, I doubt pg accepts "pull requests" or anything. He likes the site the way it is, apparently (I don't like HN to have a million share buttons either, but I do want a few things added that would make life for thousands of HN visitors much easier).
I really doubt pg likes the fact that HN is so painful to use on mobile, and this is just one example. I understand that he doesn't have time to work on the site himself, but he should at least consider appointing some "community committee" consisting of trusted users who are willing to help. Sometimes letting go is best.