An observation from the transponder data:
The aircraft descended out of cloud almost at the same instant that the groundspeed reached 120 kts, i.e. the indicated airspeed was then around 130 kts which I guess was fairly close to Vref. And it was practically on the glide slope.
Scenario: A quick glance at the instruments indicated everything was OK, so attention shifted to the runway ahead. But, as the data suggests, in fact the airspeed was decaying at a rate that only ~10 seconds later took the aircraft below 110 kts indicated, which is, I guess, about the stick shaker activation speed.
Is it plausible that the cloudbreak caused a diversion of attention at the critical time? Just asking.