One thing to consider is Bill 96 which will present some trading challenges. For example appliances, they want all markings to be in French. But Quebec is one province of 8.5 million people surrounded by the rest of Canada with a population of 32.5 million and the USA with 340 million people for a total of 372.5 million, Quebec represents about 2% of the total population combined with Canada and the USA. Custom tailoring appliances for a small portion of the market will make prices go way up and the selection will be greatly reduced. Other products might disappear all together. Already many items cannot be delivered to Quebec.Is Belgium a real country? Or Spain, or UK, the list is very long. Strictly mono ethnic countries are rather exception than the rule. Fragmentation based on ethnicity and language is not good for business. This is why the European Union was formed. Quebec, if independent, and in bad terms with the rest of Canada will be forced into custom union with the US as maintaining new independent currency next to colossus will be out of question. Eventually, it will end up inside huge US belly and will be slowly digested. US will have few sentiments toward French culture; you can just look at Louisiana. So, you should be very careful about your wishes. Notwithstanding frictions and grievances Quebec has the best chances to maintain its French heritage inside Canada.
You are right about fragmentation and Blanchet is not wrong, one of Trudeau's first pledges was to make Canada a post-national state and he succeeded. Does Canada even have an identity anymore especially in the big cities? I see a lot of balkanization. But right now is not the right time for this, the media effectively brainwashed people into thinking that the biggest threat is Trump (the housing crisis and cost of living crisis is out the door) and everyone is turning to the Liberals, even separatists are who seemed to have abandoned the Bloc.