zeke
When the rudder padel move a signal is sent to the ELACs . one reason is the nose wheel steering . The question is , is it only for steering .
You are correct in explaining the engine out scenario.
I believe the rudder padels only input to the rudder mechanicly not electrically through the elacs.. .The summing point is the clever mechanism which recieves inputs from the rudder trim,rudder pedals and yawdampers .