I think the problem with the decision was that a normal 2 engine TOD would have been say 3 x Alt in thousands. Once on one engine, that TOD pulls forward when you consider a second failure, to something like 2 x Alt in thousands. So a 2 eng TOD becomes a long drag on one engine, then the destination becomes unachievable if at any time the second engine fails from TOD, even single engine TOD, and that was what hung the pilot involved. The difference could be 40 miles or more. It is accepted practice in simulator training that on one engine, you do not rush, but you do try and get it on the ground without undue delay. Then with a chuckle, the trainer makes you go around!