So our friend M. Ziegler seems to be a bit of a Gallic Mr. Sutter - also head of engineering on another well known aircraft, although from what I have heard and read, Sutter was very hands on (nuts, bolts, and slide rules), often down on the floor solving engineering problems - although the story of the Sutter Twist, (the work-around that precluded a complete and very expensive redesign of the 747 wing) is admitted by Joe himself as being a group realization and effort.
In the video you linked, Mr. Corps covered the thing that most impressed me about the A320 FBW system - the autotrim function (nicely done in normal flight) extending out to an engine out scenario. Being a key engineering test pilot, I would imagine GP had not only extensive knowledge but indispensable feedback to offer on the system. I agree that it would have been nice to hear more from this gent, particularly (for me) the Anglo point of view on the history of the programme.
I will delve into our other discussion when the sun is over the yardarm and am mainly responding to thank you for your links and information good sir!