And I would put money on the fact that there was no issue that required immediate low level dumping.
All the evidence points to a crew that rushed into an approach and dumped at an inappropriately low level. Unless they had evidence of an impending problem with the remaining engine there was no need to hurry.
Rather like the Iran shoot down, if it looks like a duck, walks like a duck and quacks like a duck it probably is a duck.
LD