Actually only last night I was watching an Aircraft Investigation program on the National Geographic channel on TV and there the NTSB said that under no circumstances should the rudder be used under normal flight conditions as the enormous strain put on it during flight could snap it off which actually happened in this case.
They say the rudder should only be used during a crosswind when landing or to help hold the aircraft on course if one engine has failed.
Apparently some Airlines actually trained their pilots to use the rudder in flight which the NTSB claimed is wrong and these pilots had to be retrained.
I don't know if I'd go as far as saying not to use it at all. The crash was caused by the co pilot slamming the rudder back and forth several times, which overstressed the tail. He thought he was fighting turbulence but was actually causing the movement himself. They still use a little to keep it coordinated, just like a small plane. However, most larger aircraft have a cheat, called the yaw damper. If the yaw damper is engaged, it automatically controls the rudder, which could explain why your rudder on the Airbus was not moving.