Would GB really want to seek the cession of New France? It's very un-mercantilistic, but if suppose if the Allies do win it's an easy thing for France to lose without losing too much revenue. I would imagine they only lose a part of New France, namely Quebec. As Thande says, there are a huge amount of ripples that could alter the shape of British North America with an early acquisition of New France -- particularly one that's associated with the Glorious Revolution. The New Englanders will be in paraoxysms of Protestant popery-hating joy. I've no doubts that the august persons on this thread can divine such ripples, but I wrote a fairly long post about them
here so I'll leave it at that.