Other changes you might consider:
(1) Creating more than one category for posts (e.g. research, outreach, announcements, chat).
A first advantage is you can group by topic. The second big advantage I see from this is that different norms can develop for different categories. The threshold for posting in the EA forum is currently (perceived to be) too high for drafts or off-the-cuff ideas. So these either don’t happen or move to Facebook (where discoverability is much worse). On the other hand, the prestige of posting, and the quality of discussion, is too low, so the most influential and busy EAs may not see it as a good use of their time. A way to improve this may be to have a very strictly moderated high-prestige section, and a more loosely moderated low-prestige section.
(2) Allowing markdown in the post composer
(3) Tagging users so they get notifications. I tried tagging “Tee”, who posted here about moving up to the Executive Director role at .impact, in my previous comment. But I couldn’t find a character like @ that allowed me to do this.
(Is there a place to post feature suggestions like this?)