What are the likely failure conditions when RFFE Control Voltage Levels are exceeded on BGSA family Antenna Tuners?

I'm specifically interested in understanding the failure condition when USID_SEL is pulled up to 3.0V on BGSA143ML10.

VIO is within spec at 1.8V. 

The Max sustained voltage on RFFE Control Voltages is listed as Vio+0.7 up to a max of 2.2V. There's also the instantaneous ESD levels of several kV that these pins can withstand.

Those inputs are likely protected with a 0.7V diode. Is there a sustained current rating for those diodes?

If the input does fail, is it expected to fail open, shorted to Ground, shorted to Power, or some other case?

With the understanding that the input pins should NOT be connected to any source above 2.2V, I appreciate all comments.

Greg 

For a low power application (RX) will the device function below 600MHz - or in other words are there any significant functional loss when operating at lower frequencies - at very low powers?

Fully understand that the device is not characterised at these frequencies, and that we will have to do that ourselves.

The BGSA142GN12 SP4T switch data sheet shows a single RFC pin. However the PCB footprints for the switch show an RFC1 and RFC2 pin. How should these 2 pins be handled? should they be shorted together? should RFC2 be floating? 

Thanks!