Half of our fleet is -400 and for reasons that be we use flaps 40. I have landed a plane with nothing but 3 tons of fuel onboard, also did the same 200kgs below the increased maximum LW. I think there is no difference in pitch on approach (agree with the above) and it is still positive albeit marginally, 0.0+ to 1,5 deg, wind dependant.
Thus even with no flare the mains hit the ground first.