Successfully changed my Zigbee radio channel with the 694 firmware installed. In my case it took about 2.5 hours for the devices to reconnect with no intervention (I only have a half dozen Zigbee devices paired at this time).
For the record, just to see what would happen I tried replugging one Iris Smart Plug immediately after the channel change just to see if that would speed things along (it didn’t); I reset and re-paired one device (basically to make sure my radio was still working; that did work to immediately reconnect at the new channel). For the rest I just let time pass and let them do their thing.
