Only flight testing will show the optimum amount of aileron droop for each flap setting, and when the aircraft is delivered, it will for sure include this feature.
If you had said
confirm I would agree. Tunnels and CFD are very good at predicting such matters these days.
As for rapid small movements of the tailplane I would think it unusual if a FBW design did not respond thus during flight even given zero pilot input - unless one was talking about absolute flat calm conditions.