For Roselawn sake!
There were two reports on Roselawn accident; one by NTSB the other by BEA. They both agreed that primary cause of accident was design of ATR ailerons and de-icing boots combined with freakish icing conditions (nota bene - icing was not severe but light to moderate) and that at no point did the aeroplane stall. Main difference between reports was order of contributory factors: BEA put crew performance on top, making fuss about non-flight related rant recorded on CVR while NTSB put ATR design and certification process on top, making fuss about aerotunnel tests that shown aileron hinge moment reversal at AoA well above stall.
For the n-th time: while the actions of the N401AM's crew were somewhat unusual and lead to the accident, they were far from unreasonable and no one can blame the crew for the crash. Also at the time of the ATR72 icing certification there were no spray tankers capable of producing supercooled large droplets (and I very much doubt that we have them today) so there was no way ATR would know that their aeroplane misbehaves when hit by SLDs. Actually if it weren't for the Roselawn, chances are we wouldn't know anything about SLDs.
Regarding the Buffalo accident: chances that there was ice accretion on airframe that adversely affected aeroplane's aerodynamics are very, very close to zero and NTSB has stated it almost three months ago.