Lonewolf
"...bear, it seems that in FBW, "return stick to neutral" might not necessarily remove the nose up/climb command. As I understand the sidestick function, your "back stick" command tells the plane to do "x" (a g command), which it keeps doing until you (gently?) move the backstick again to tell it to do "y." (different g command)..."
Yes, but the a/c is in ALAW (maybe?). PNF says (eleven seconds after) a/p drop, "alternate Law". To stop the climb would take a second ND input, No?
Could PF be fighting a (P/AB 'IO') battle? PITCH is not Direct, only ROLL.
Pilot/Airbus Induced Oscillation (PAIO) ....bear says.
No let's call it PilotAirbus Oscillation Induced Oscillation. Remember, the PF input "several" NU commands. Were these intended to counteract the Bus' argumentative ND? Each of her ND's of too little duration to cause the THS to relent in its travels to 13 degrees?