Very sad and seeing the pictures of that lovely family very tragic.
Looking back I can understand why some pilots fly in such bad weather when even the birds would rather be on the ground. Many of us have done that in the past.
It really reinforces the idea of flying within your own limits and the aircraft limits and sadly many overestimate their own limits or the aircraft limits some of us get away with it. But especially carrying such a precious cargo brings a special responsibility.
My feelings and that is all they are is that the winds had more to play in what appears to be a stall and crash.
I have flown in conditions where the ASI is leaping up and down 25 to 30 kts with severe windshear.
Not a time to be flying low level near the stall or for that matter near the normal VREF. One massive downdraught ?
But as I said just an instinct it could have been disregard for airspeed while peering into the gloom or overbanking again at too slow a speed.
Very very sad
Pace