Resolved.
Either the device didn't like being on a (non-management) VLAN of another Ruckus network, or the mobile app saved my day. Initial config with mobile app failed with message "Unable to fetch default configuration from the AP". Restarted the AP, still had the issue with Building Uleashed network and no graphical elements in the GUI. Second pass of the app config wizard completed and the WAP rebooted.
Still no sign of the configured SSID, so I removed another Unleashed network from the LAN, as the new AP was connected to a guest VLAN in use by the Unleashed network (tho not for management).
Then the AP came up, GUI working, SSID created, etc. Not sure if it was persistence with the mobile app, a crashed firmware, or removing the other Unleashed network from the area. In any case, it works.
Thanks to all who replied, and Ruckus support.