Alf - you just cannot put EGPWS and some 'automated' long-landing system in the same frame. It is more than possible to be IMC/at night and lost and then warning of terrain is vital, but if you are on a visual approach and are 'lost'........................
Do you need a warning that you are still airborne and the touchdown zone has gone behind your feet?
Why do we land in tailwinds? Why not? If the performance is there, what is the problem? The 'performance' assumes competent pilots,of course, so should we mandate a minimum of 10kts headwind perhaps?