Machinbird
Whilst I do not doubt the phenomenon exists I was reading your post as an indication that you believed the design of the sidestick played a part for inducing the oscillations. This is what I was questioning. All evidence from the Airbuses flying is that the sidestick is a reliable and useful input device with very little in the way of vices. The more I see of the evidence the less it appears that the machine had any role in the accident. There is no 'smoking gun' as it were; just pilots who were not adequately trained or prepared for what should have been a recoverable situation.