We appreciate it the way we do a finely tuned touchpad: you wouldn't want too much friction while swiping around, but that little bit of traction makes finger input feel a little more controlled, a little more precise.
All of these buttons require a firm press, rather than a tap, and while you won't accidentally activate the controls, registering input can take a bit of effort.
Cathal Boylan of Sinn Fein said he was "a wee bit concerned" as he had the impression that the zones would be designated whatever DARD's input might be.