Hi Right Way Up,
With regard to the stall warning this troubles me that an integral part of dealing with unreliable airspeed is not actually always available. Surely this needs to have ground air logic as part of it's operating envelope.
I agree.
Also one wouldn't confuse the stall warning vibrations felt through the control column of a conventional aircraft with anything else. Under stressful conditions, crew can miss interpret audio clues easily (like the synthetic voice intermittently saying "stall stall" or "speed speed").