"[T]he European Court of Human Rights upheld the French niqab/burka ban in 2014 on the grounds that the requirement to show one's face in public fell under "the respect for the minimum requirements of life in society."

Well, if it's good enough for the liberal Europe, then it should be good enough for Canada. PQ voted against Bill 62 as it was not consistent with Europe's understanding of living in a freer society.

Quebecois society is a work in progress for secularization for the rest of Canada to emulate at a later stage.  Face covering, just because one is female , has nothing to do with Islam. This is an oppressive habit from pre-Islam period but it co-existed.  

PM Trudeau has not shown a well developed understanding of face coverings other than that for bank robbers.  Charter is not absolute; it must be demonstrable in a  just society.  He cannot claim to be a feminist when he is endorsing oppression of certain women without them being  in the wider society.