Karel_x, Lomapaseo, thanks for your responses.
I certainly agree we still need pilots! I'm just stuck a bit on how these guys could have known that their reversers weren't fully deployed so that they didn't apply thrust the second time.
I had read here somewhere that a relay that was supposed to prevent deployment was "stuck due to the cold" - that seems a bit implausible to me - I'll wait for the report and see what they have to say. From what I have heard MAK does good work.