With all due respect this approach had gone horribly wrong well before they got anywhere near DA, so the weather at the airfield is largely irrelevant.
There was nothing wrong with the aircraft, as far as we know, so a qualified crew should have had no problem flying the approach in this weather, except for a large failure of situational awareness for what ever reason. If OPS told me that they’d replanned a flight below RVSM airspace because the autopilots were U/S and I refused to take it because the weather at destination was 2600 m ovc at 200ft I think they would be asking if I should be in the left hand seat, or in fact either seat...