After quietly watching for 23 pages, my take is this:
What we KNOW is that an aircraft ended up on its back beside the runway, killing 6 people.
The visibility was very low - but planes have ended up on their back beside the runway, killing people, in CAVOK conditions (FedEx/Narita, Sioux City). The low vis could be just an interesting sideshow to the accident.
Planes sometimes roll over because they lose part of a wing - but they also sometimes lose part of a wing because they roll over.
Planes sometimes roll over because they lose an engine - but they also sometimes get asymmetric engine damage because they roll over.
It appears there is evidence of a wing dragging, from more recent reports - presumably marks on the runway (or wingtip). But even so, there are multiple possible reasons for a wing to drag.
Without poor weather conditions.
Without an engine failure.
I'm just saying we might want to wait for more facts before spending 23 pages arguing pros and cons of things that may well have no direct causal connection whatever to this particular accident.