I can't see how someone who is incapacitated is going to manage to get down at that descent rate and get over the threshold and touch down at all, let alone stay on the runway.
+1
I think our guessing here is to get to a point, so that we can build a acceptable scenario for ourselves - its hard to accept that someone with that experience level just 'fukced it up' completely.
I sure hope the AAIB can come up with an explanation that would at least give us something to learn from this accident, but I doubt it...