But the aeroplane had not encountered, before or during the accident, an exceptional meteorological situation from the point of view of phenomena that are traditionally avoided in stormy environments (turbulence, lightning, icing).
Hope that puts an end to the "thunderstorm" brigade. It is deemed to have been "nothing exceptional", though the wise decision would have been to avoid it.
....the presence of flight envelope protections makes neutral longitudinal static stability acceptable. ....It appears that this absence of positive static stability could have contributed to the PF not identifying the approach to stall.
A bit of a "soft" excuse when you've already managed to dump most of the kinetic energy available.
Machinbird;
Your PIO roll proposition appears to have been confirmed.