Hello Ryuji,
I will be taking over this for David as he has urgent matters to attend to. Please my answers below:
1. This is still being looked into.
2. The leakage currents are specified in the datasheet as described above. Customer can expect no more leakage than the max value across temp and process. Are these values not acceptable to the customer? Why does the customer need this data?
3. Supply current has no dependency on the input voltage to the switches. regardless of if there is 1 V 2 V etc on the switches the same voltage is applied to gate of the switch to turn it on.
Regards,
Andrew