The EA forum (and LessWrong) are both structured primarily as a newsfeed of posts sorted by date. This caters well to immediate engagement, but is much worse for building up a repository of knowledge which is accessible and relevant over a long time period. LessWrong 2.0 has (to some extent) managed to avoid this problem by having a) curated content, so that people don't have to look at literally everything which is posted, and b) sequences which store great posts in a format that makes them easily accessible a long time afterwards. The EA forum has neither. This makes it rather frustrating to try to use it to build on existing intellectual progress, as I recently found out while reviewing forum posts on career advice. Why don't we have any mechanisms for ensuring good content lasts, and what can be done about this? (Even just a blanket 'curate everything above x karma' strategy would help, while requiring very little moderator effort. EDIT: I actually no longer believe this last part, I think the key thing is collating material from across the internet.)
The EA handbook already exists, so this could be the basis for the first sequence basically immediately. Also EA concepts.
More generally, I think I disagree with the broad framing you're using, which feels like "we're going to get the definitive collection of essays on each topic, which we endorse". But even if CEA manages to put together a few such sequences, I predict that this will stagnate once people aren't working on it as hard. By contrast, a more scalable type of sequence could be something like: ask Brian Tomasik, Paul Christiano, Scott Alexander, and other prolific writers, to assemble a reading list of the top 5-10 essays they've written relating to EA (as well as allowing community members to propose lists of essays related to a given theme). It seems quite likely that at least some of those points have been made better elsewhere, and also that many of them are controversial topics within EA, but people should be aware of this sort of thing, and right now there's no good mechanism for that happening except vague word of mouth or spending lots of time scrolling through blogs.