My complaint is that it is on the front end of the ability instead of the back. I am not sure why it is designed to have the cooldown when activated, but not deactivated. Given the games natural buff delays, it isn't too uncommon to accidentally toggle it back on from a double tap because you thought the initial disable didn't take. They need to let it activate without a cooldown, then throw the 5 second delay when you turn it back off. This removes the fat finger complaint (which is completely valid) without ruining the strategic usage.