> To your other point about curator: can we just upgrade Curator to 1.0.22 (I think that's the stable 1.0.x version)? I'm not sure there's much merit for duplicating efforts.

Upgrading curator has been discussed numerous times, and that would probably best be started as a separate issue.  I think an upgrade was even attempted in the past, but reverted.

The place to go for ZK/Curator upgrades is now #480.