NF doesn't reduce the difficulty of a map.
If one plays a map with NF and clears it, osu! should register full score (not half). If player fails to clear (i.e. HP drains out) only half score should be registered.
If one plays a map with NF and clears it, osu! should register full score (not half). If player fails to clear (i.e. HP drains out) only half score should be registered.