A cogent analysis.  I would add that demographics ensures the continuing decline of Quebec numbers and influence in parliament as the much faster growing population in the West and Ontario mean that about every five years an independent commission reviews population trends and recommend more parliamentary seats for the western provinces and Ontario while Quebec and Atlantic Canada get few if any new seats.  Within a couple of generations, Quebec will have declined from its former peak of about 1/3 of the seats to 1/5 or less of the seats.

Obviously, this will make it easier for a party to do what only the Harper led CPC ever did which as you say was to win a majority without Quebec.

This doesn't mean, at least to me, that we should play hardball with and neglect Quebec but it does gradually make our elections fairer in terms of rep by pop.

Thus, we will be able to avoid the Trudeau 1.0 debacle whereby he won 2 of his 3 majorities with a minority in TROC but massive Quebec support.