recceguy,
BEagle made some very relevant observations on potential problems with the Airbus autopilot characteristics in the AAR role. Certainly, response to yaw moment generated during receiver disconnect will need to be investigated.
As to your suggestion that he doesn't know what he's talking about, your comment of:
"So how do the frenchies manage when they disconnect with their Mirage 2000, which is fully FBW "
seems rather unusual for someone who claims great knowledge in this field. If you are trying to suggest that the froggie M2000 boys are on AP whilst plugged in then I would seriously doubt you are as swept up on AAR ops as you think you are!