The final report will vindicate him if appropriate. In the meantime, speculating on possible motives for pulling cb's does serve a useful purpose as it is at least a cautionary tale. Maybe the faulty FACs were tripping the AP and the cpt was not comfortable with that. He perhaps knew from experience that a hard reset would fix the problem. Inexperienced PF then gets thrown into alt law for the few seconds it takes to reset and overcompensates when he hits turbulence at the same time. How does the rudder respond in alt law with protections off?