It is so strange to me when people get downvoted for suggesting a possible solution is to volunteer some effort. HN is all about open source until someone mentions creating a PR or even just a simple issue. Is this forum the definitive spot for complaining about software?
Filing an issue on GitHub is the correct thing to do. It has higher visibility for a longer period of time than a hacker news comment and is more likely to resolve the issue while wasting less time of the maintainer's and anyone else using the software.
edit: It seems you've been upvoted back to normal. Ignore me.
If it were a product or merely a project, you would be correct. But, open source software has too many users who think they are owed free features as it is. What's more, there's a high possibility that people on this particular forum actually have the skills to implement a proper PR. Finally, their comment clearly wasn't meant as a dismissive counter request but rather as an invitation for mutual excitement, and even an admission that the criticism was correct, but would be better served on the Github repository.
Filing an issue on GitHub is the correct thing to do. It has higher visibility for a longer period of time than a hacker news comment and is more likely to resolve the issue while wasting less time of the maintainer's and anyone else using the software.
edit: It seems you've been upvoted back to normal. Ignore me.