They could have had a 15,000' long runway and it still would not have mattered. If there is ice on the wings??? then game over. The airplane performed as advertised... unfortunately very poorly with ice on the wings and potential for possible in-gestation of FOD into the engines by taking off on a more contaminated runway.
It’s the first officer that should be sued by the survivors for gross negligence. But you know the bottom feeding scum sucking attorneys... they will go for anything no matter how outrageous the case.
Look the bottom line is that there was ice on the wing. They chose to ignore this hazard. The strapped the jet onto their backs with innocent unsuspecting passengers and a flight attendant in the back. They took off and well you all know the rest of the story. It’s a tragedy the first office will have to live with for the rest of his life.