Looks like Indian independence movements will be gaining traction far more quickly this time around. Fools like Lucan are how you lose Empires.
It's a good idea to look at the Wikipedia page on Territorial evolution of Canada. You have Quebec larger than it was in the 1860s and most of what is today Quebec was Rupert's Land and would have been ceded to the US. But Labrador would have been retained by Newfoundland. Many of the northern islands of Canada were not part of Rupert's Land but were a separate British possession. They wouldn't have been transferred with the sale of the Hudson Bay Company. IOTL they were transferred to Canada in 1880.