@TeriCuocci 

The reason for this is that you have to be physically connected to the smart device to configure it for a home network.  Once it's on a home network the default network is disabled and there is no direct access to the device, except through the commands sent through its cloud interface.  You can't use this cloud interface to change the network because as soon as the network name changes it won't be on the network and the command can't complete. A full reset shouldn't be need just remove the device from your Kasa app that should trigger the connection process (blinking orange/green light) and allow you to re-add the device on the new network.