If fire was the problem, why didn't the pilot just land by sea?
https://www.youtube.com/watch?v=WE2Yn0cipTY
767s are bigger than A320s and the ocean is a lot rougher than the Hudson.
This is probably not a good crash to use as a baseline for predicting what would be typical for an ocean landing attempt.
The hijackers, who were apparently young, stupid and intoxicated - forced the pilot to try to fly to Australia, even though the pilot said they didn't even have enough fuel to make it 25% of the way.
The plane ran out of fuel off the coast of Africa, and the engines died.
The pilot used a Ram Air Turbine (basically using airspeed to drive a turbine) to provide emergency power so he could land.
However, I assume the hydraulics didn't work at this stage, hence he couldn't use the flaps to slow it down.