It would be wonderful to have a double pole switch ( necessary for code for 220v US devices ) .  Yes would be great to also make this 30A ,, but there are a ton of 20Amp, and less, places for this switch.   I am using zigbee relay switches now, but would love to move to all KASA. devices like - small in wall heaters ( 10Amp) , compressor, attic fans, water heaters, mini-split ac, window ac, ... and lots more.    I have a couple of these in use today.   Not sure there is broad market,, but would love to see a true double pole switch available!   There is nothing from the tier one smart switch vendors :(   glad to discuss .