I think this is a more compelling incident than the Germanwings crash. This has a larger bearing on how we operate the Airbus. I will be very interested in the final report from the TSB to see what they set for FPA, when they started down from the FAF, or even if they inadvertently started down before the FAF.
People here have questioned why they didn't use the PAPi. With a half mile of visibility even on the proper descent angle to the runway it would have been difficult. At a 3 degree glide path 300' above field elevation puts you a mile out. PAPis are usually about 500' down from the end of the runway. So that's just over a mile from the missed approach point to the PAPi. Hard to pick up with blowing precipitation.