Just published all the latest schematics for new PCB design.
1. Added a 5th relay
2. Switch to a ribbon cable, and
3. Replaced the reset switch (which only works with the original Pi Zero) with a power switch (which works with all Pi Zero boards).
If anyone out there has a device and can test the new v1.5 SD card image, I'd love to get enough feedback to make that an official release.