The local , provincial and federal politicians should insist that the airport infrastructure be upgraded to include an ILS on Rwy 05. Long overdue.
There is a RNAV (GNSS) Z approach to runway 05 with LPV minimums to 720' MSL or 257' above ground and requires 1 mile visibility.
There is no reason why the crew could not have used that approach and have Vpath info to touch down on the RWY.
This airport is also CAT II certified with an approach to CAT II minimums on RWY 23.
IIRC when in CAT II/CAT III operation, airports (in Canada) have to be on their own internal power using their own generators and not rely on an outside source for power.