Hey Jed. I'd be interested in a post mortem on the fork, how the network broke down, and how the new protocol addresses those issues. Reading the paper, I can believe the new protocol works, but it's difficult for me to pinpoint how exactly it differs from the old protocol.
I'm also interested in how the explicit quorum slice data for each node can be used to maintain quorum intersection over the entire network as new nodes join.
I'd be interested in a post mortem on the fork as well. During the split, either one side has a supermajority or neither side does. If one side has a supermajority, that side will win on rejoin, so no problem. If neither side has a supermajority, then one side or the other will win on rejoin, but nobody's been relying on either side. In every case, there should be no problem.
I'm also interested in how the explicit quorum slice data for each node can be used to maintain quorum intersection over the entire network as new nodes join.