(I haven’t listened to the end of the recording yet; from the way the conversation is headed it doesn’t sound like there’s going to be any further discussion about the resignations or board size. Edit: I listened to the rest of the recording and this wasn’t discussed.)
GiveWell recently published the recording from its April 2019 board meeting.
I was holding that this meeting would include discussion of why the members resigned, but I was mistaken.
It seems that Rob Reich, Brigid Slipka, and Tom Rutledge resigned before this meeting, then at the meeting the board voted to formally reduce the number of board seats.
So I’m not sure that there is any publicly available discussion of these resignations, apart from the statements GiveWell published in April.
(I haven’t listened to the end of the recording yet; from the way the conversation is headed it doesn’t sound like there’s going to be any further discussion about the resignations or board size. Edit: I listened to the rest of the recording and this wasn’t discussed.)