@Machinbird - If you substitute "must" with "may", I'd be happier about getting on board (if only to not rule anything out). If the rudder was out of trim, then you'd see consistent corrections in the traces prior to A/P disconnect - there aren't any as far as I can see.
The consistency, magnitude and frequency of manual inputs post-disconnect occlude any reasonable conclusion as to what the aircraft would have done if left to it's own devices. If the PF was correcting a constant roll to the right, why the sudden reversals of bank input to the sidestick? Surely a gradual and consistent left bank input would have been enough prior to stall - after which, as you say, ailerons become ineffective.