If I am not mistaken the 777 has a feature that the closer you are to te stall speed the harder you have to pull the yoke
You missed many posts on the subject.
Why was he not suffently monitoring the airspeed?
Nobody knows. It is not NTSB's role to psychoanalyse a pilot. Perhaps if there were sufficient distractions in the cockpit - fire, smoke, failing engines, etc - there will be plenty of excuses, not here. By the way it is not HE, it is THEY.
Did it in this case work for them or against them?
Maybe yes, maybe no, a purely academic exercise. Many pilots before them committed similar errors and there was no stall speed protection of any kind. Again, NTSB doesn't answer questions it has no answers for. By the same token you could say in this case weather worked against them too - weather was too good, if it were IMC they could have shot an ILS and possible survived.