I just pulled the approach plate for CYHZ and it's new from just a few days ago (2017-10-17)...
The changes stated on the approach plate are D-ATIS, lighting and visibility.
I must assume since the accident they may have improved the lighting system for RWY 05. Also as you pointed out, there are new/higher minimums for that approach but the visibility is still the same at 1 mile. The rest of the approach remains the same with the same DME being used to dictate the MAP at 1.7 DME which again is the threshold of RWY 05.
NOTE: In Canada with our "Visibility Approach Bans", Air Canada (and others qualified) could start the approach with less than the 1 mile visibility required on the approach plate.
Last edited by Jet Jockey A4; 30th Oct 2017 at 10:30.