Next time in cruise, take a look at the RTLU on the F/CTL SD page, just to see how much rudder authority you would actually have.
I would even go as far as to say, an engine failure at cruise levels (why else would you need rudder input?) accompanied by the autopilot dropping out at the same time would result in minimal yawing - the FAC's yaw damper will take care of most of the resulting side slip.