I agree with most posters that the crew has done a terrific job.
However, on the RJ you can split the Ailerons and/or Elevator in a second and I would therefore not qualify this incident as a landing with complete loss of controls.
I would however state that the BA 146 / RJ is a piece of crap not only in the way it was designed and performes but most efinitely in the way the AOM / QRH are written.
I can hardly imagine how this thin ever got certified, but then again it was a political project to create jobs at all cost.