You know, all the discussion of altimetry should really be set aside; it takes our eye off the "basic airmanship" ball...
If the aircraft went around from 1000 MSL, and that equated with 400 AGL, then whether they were on QFE, QNH, feet, or metric is a moot point. ANY of those altitudes / settings would still be WAY too low while descending 8 NM out from the threshold.
And the SECOND try was also unsuccessful.
I have absolutely no idea how the 380 flies, but on approach in the 330 if the VDEV says one thing but a basic mental 3 1/2 to 1 (3 and a half miles to every 1000 feet left to lose) is significantly different, it is very likely that the VDEV is wrong / misprogrammed. What was in these guys' FMS, and does Emirates give you a lobotomy when they put you thru Airbus school?