Sorry if I misunderstood the chain of events, when I assumed a stabilised approach there with the radalt starting things off by giving a low altitude that triggered the power reduction.
Even so, normal CRM should see the PNF calling "Check Speed" as it dips below VRef, yes? To get to 80 knots IAS, if that is so, well, that is one very long way from Vref so that crew inattention must come into it to some degree.
You would assume that being given some sort of "rushed approach" would see you sat up, paying close attention to make that work. The distractions should be balanced by extra awareness. Or, if things aren't working out, I guess that must be your cue to do a missed approach and try again with something more within your capabilities "on the day."
It will be interesting to read the official report and see what exactly did happen there.