Here’s an update on my end.
I spoke too soon about the wifi. When I checked this morning, OS was unavailable via the web, and my programs did not start automatically.
After a reboot, I ran the one time program option, and the first zone completed and the second zone started up.
During the second zone start, the web interface dropped out again. The second zone ran past the scheduled time, so I bounced the PI again.
Next, I just did a manual one zone run from the homepage – it ran to completion, and web was available throughout.
I started my last zone via the homepage. Web interface dropped out, and it exceeded the duration, so I power cycled the Pi to stop it.
It would be nice to get a standard build image that supports the RPi2, so we can level set the environments everyone is running.