Hey John,
There was a limitation prior to 5.0 in which the WLAN had to exist in the zone in order for the template to overwrite it. So creating new zones from scratch was recommended using the zone template. Not exactly user-friendly. So in 5.0 we enhanced it to be able to create the WLAN new (from scratch) if it didn't exist yet.
Also, take note that the WLAN template is firmware-specific since the WLAN objects and integration may change from release to release.
thanks,
Marcus