I agree with you at this point. But i wonder that if the pedals without trim or servo actuator was used, how to suppress uncommanded rudder movement during AP disengagement(especially cross wind, low altitude).
I'm sorry, "suppressed" maybe the wrong wording for that. Sudden rudder movement from the actual position to the new (trimmed) neutral position should be prevented.
Can FCS mitigate the transient and continue a safe manual landing?
For automatic landings both AP's must be engaged, if really both AP's will be disconnected, i don't know how soft the transition is, sorry.