@sigmdel, I am impressed with this very well written article. Thank you for the information.
One thing I noticed while researching RF switches.
Even when no power is applied, when HIGH is input to a port, it is the same as applying power to VDD through an ESD protection diode that is built in between an input pin and VDD.
According to this hypothesis, if an external antenna is selected (by inputting HIGH), it will function properly even if no power is supplied.