CHECKLIST items
Just as a reminder of where the focus needs to be:
The Boeing checklist, printed on the chartclip that is affixed to the steering wheel in the B-767 and B-757 contains only the really important items:
Take-Off
FLAPS
Landing
SPEEDBRAKES ARMED
GEAR DOWN
FLAPS
The warning system is just there to alert the pilot in case he has forgotten to set the mentioned items in the correct configuration.
Having items in the wrong configuration is not the fault of the warning system.
(This is not written as accusation of the deceased pilots. If the final outcome of the accident investigation proves that the high lift devices were not properly configured for take-off, well, to err is human, it is as simple as that).