By the way Sully did not handle the Hudson River ditching perfectly. As it happens his mis-settings were not fatal, but they could have been in different circumstances
That's true. He was faced with unpracticed situation and tremendous time pressure. The Engines had not failed but damaged to produce any meaningful thrust. Therefore the aircraft was in Normal Law. Configuration was not important but he didn't maintain his speed. The low speed triggered Valpha prot and he wasn't able to flare sufficiently leading to heavy impact. Perhaps twistedengine wants say if on automation was possible it could've controlled speed better.