The Dornier 328 fed AoA to the stall redline on the ASI tape in real time. You could watch the redline bob up and down in response to gusts. Direct display of AoA was there none on that type.
Ditto the Q400.
I used to fly early A320 (s/n in mid-200s) with analogue electro-mechanical AoA indicators set outboard of PFDs but the only thing they provided was some poor inflight entertainment. Also there's major difference between fast/slow indicators that are indexed to selected speed and AoA index lights (green doughnut, red and yellow Vs), found on some military aeroplanes.
Bombardier's AOM regarding latest NTSB findings has somehow found its way to my mailbox, but there was nothing in it that wasn't already posted on the PPRuNe.
If you really want to know what exactly happened and why, please come back in a year or two, when the final report is published. By the time final report is out, most of the PPRuNers discussing the accident tend to be knowledgable professionals.
Regarding the Perpignan, prelim report is out. Please anyone wishing to refer to the said accident, do acquaint yourself with it. It might spare us the incorrect notions similar to:"it wouldn't have happened if it was hand flown".