Hello,
Pro firmware does not implement the option "Don't activate if the button is long pushed." (present in the old Shelly 1xx devices) that is really needed to take advantage of the long pushed event. 
I've been able to reproduce this behavior setting the input button in detach mode and configuring an input action to toggle the output at any short press event.
Unfortunately this action requires about half second to effectively switch the output, extremely noticeable and annoying when it is used to switch on/off the lights of your sofa from a wall button. 
Do you have any idea, suggestion or indiscretion about this topic?
Do you know how to submit requests for new functionalities to the official Shelly development team?
This missing capability is forcing me to continue buying legacy Shelly1PM instead of sponsoring the new Shelly Plus 1PM or Shelly Plus 1PM Mini... 
Thank you
Andrea