Could you define what counts as sufficiently "current" in your view?
I am a bit concerned that there are already practices that significantly favor larger organizations, such as GiveWell only considering orgs with tons of room for more funding for its top charity status. It's not cost-effective for evaluators to devote considerable resources to updating evaluations on midsize organizations very often. And there are downsides to putting all the eggs in a few baskets, which I fear a demanding currentness requirement would promote.
I think I would ask the recommending evaluator to affirm every X years that there are no known significant/material changes from the public evaluation, and have an absolute sunset after Y years -- but X and Y would differ to some extent on current organization size. Otherwise, I would model a decay function based on the date of the last public evaluation -- the assumed cost-effectiveness reduces over time as the amount of potential information not in the public analysis grows, and removal is triggered when the adjusted effectiveness no longer meets GWWC's bar.
Thanks again for this suggestion Jeff! However, for reasons mostly outlined in my comment here (under (4)) GWWC's position remains that we should not restrict charity recommendations only to those who have a recent public evaluation available. I'd be interested in any more arguments coming out of this discussion that would update our view though, and these could feed into a revision of our inclusion criteria later this year.
There's one thing I'd like to add - based on the emphasis of your new post: as you mention, there are multiple reasons why people choose to donate to charities over funds, even while we generally think that donating to funds will be the higher-impact option. I think I have lower credence than you seem to have in "not trusting funds" being the most prominent one, but even if it is, I don't think the current situation is problematic for donors for whom this is the main reason: those donors can easily see whether a particular top-rated charity has a recent public evaluation available (e.g. this will be highlighted on its charity page on the GWWC website), and adjust their decisions accordingly. By keeping the current policy, the "top-rated" label remains representative of where we expect money will actually do the most good, rather than it being adjusted for a subgroup of donors who have a lower trust in funds.
(As an aside, I don't see why the other reasons you mention for giving to charities (e.g. tax deductibility) would be more characteristic of "sophisticated and committed" donors than having a view on whether or not to trust particular evaluators/funds)