Givewell's blog has recently begun a series of 5 self-evaluation posts (they are on the 4th right now) which discuss where the organization is at and where they're going. They're all worth a read. In particular, they build up to a survey for Givewell followers about how you'd like the organization to direct their research in the future, with options to emphasize existential risk and research even if the evidence is lower quality.
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