Despite clearly being well above ILS glide-path when in the hold, these guys could surely have tuned in to get a valid localiser signal. Despite the shocking decision on the plan v range issue, it looks as if there was no absolutely no attempt by them to think ahead about the likely loss of all 4 engines and the associated loss of electrical power.
It was clearly a shock to them all when the lights and PFD/MFDs went out, but I'm still amazed they didn't ensure they maintained a position with enough height/range to enable them to reach the field.