LeadSled-
Seems both Boeing and Airbus are quite keen on the idea of manual flying with the A/P--A/T and FD off.
Unreliable Airspeed and Severe Turbulence are two completely different checklist actions.
The Autopilot,FD and Auto thrust, probably aren't going to work to well without an accurate speed input are they?
Blueskymine- You are correct, but it is the concept of the reduced drag and reduced stability that I was pointing out.