@TP-Link I second that. double tab to turn on a set of light and long press to turn off will be very helpful.

or truple tab instead of long press will be even better.

@hindseb Is this in the works? It would be really great to turn off entire rooms with multiple switches in the room. Two presses to turn all off/on 

Hi @aust 

I am afraid. I never received any updates from @TP-Link if and when this feature would be supported. @TP-Link Maybe you could share the latest status on this. 

Anyway, I found a workaround in case you use Home Assistant. You can create an automation that uses the dim-level as a trigger:
I set up the double click to dim the light to 10%. Home Assistant uses the 10% level to switch off all remaining lights including the switch itself. 

I needed a 2nd home assistant automation when you turn on the switch again. In this case, it goes back to the last dim-level (here 10%). The automation identifies it and puts it back to 100%.

The work around is not perfect. It takes some noticeable time between the double click and all lights turning off. But this is the best I found until @TP-Link builds such a feature.