Phil77,
While I agree that was not the WX they landed with, it is an indicator what was around and what type of wind shifts were possible.
As for your suggestion about something mechanical, I would be more inclined to believe that if they were on the ground they probably already had their lift dump deployed before trying to go around. They would have had seconds to get the flaps out of lift dump (70 degrees) and air brake closed before being able to raise the flaps from 45 to 15 for the go around. All of that on a wet 5500 foot runway with a tailwind. The odds were stacked against them with only a few seconds to decide to stay on the ground and go off the end of the runway or try to get her cleaned up and takeoff again with a tailwind.
Either way it was a no win situation.