Note:
Above is what I was trying to work out.
It is my counterfactual US map based on a POD timeline where Prussia is defeated in the 7 years war.
Some key points are that Quebec, not, Acadia was subjected to the British ethnic cleansing of French occupants.
Later, in the American Revolutionary War, the US wins quicker because Great Britain cannot call upon the mercenaries of Hanover, Hesse, Brunswick, etc to help in 1776 and because Great Britain initiated hostilities early with France and Spain.
Britain held onto Newfoundland, New York islands, SC/NC didn't join new union due to slavery issues, neither did Rhode Island for different issues and France received Acadia back.
I'll put together a better post one of these days, probably over X-Mas.