[RedDevil]

There has to be some slack in the pedal or the slightest variance would cause it to brake without it being pressed. In my car there's at least one centimeter of travel between the switch engage (which lights up the brake lights and activates AutoStop when going slow) and detectable physical braking.

I use that to keep rolling towards the end of a traffic jam as long as possible, covering distance for free and hopefully conserving some momentum if everything gets rolling again in time. With AutoStop regen cuts out too
If I go too fast for AutoStop to engage, it will regen more even before the point the brakes grip. That transition is gradual, however, and does not feel unnatural.