I am reluctant to discuss the Halifax incident and make any implication the crew were somehow to blame (as you appear to imply) until facts come out. It seems somehow wrong to point a finger at people who cannot defend themselves when we don't know yet what it was about.
I still stand by my judgement that the last thing you need on takeoff is an added distraction. This is from 23 years flying heavy jets on limiting runways. The performance has many safety factors in it. I believe there would be even more accidents in the form of unnecessary overruns with such a system. But I don't expect everyone to agree- just tossing an opinion in to be savaged by the wolves!