PJ2,
Thank you for a dose of common sense. I have never flown with AoA displays, apart from CofA airtests on VC10s, and I think, for the reasons you state, they would have little value in normal commercial operations. To me, the issue is the single point of failure. To have AoA information from only one sensor for such an important software control system is bizarre, to say the least. I can appreciate that the MCAS is an 'add-on' and thus inherited the existing system architecture of the 737, but I note that a similar system in the military version of the 767 uses inputs from two AoA sensors. Surely three AoA sensor inputs should be used, with a simple voting system to decide which to discard, would be better.