~ The garrison at Louisbourg could've been indefinitely garrisoned if the French had sent their fleets out on time. It was taken only when the French ships were completely delayed. This wouldn't win the war, but keep the possibility for French re-supply in Quebec/Montreal.
~ Wolfe's ASB luck in being able to scale up the Quebec cliffside to the Plains of Abraham could've easily been disastrous. If he ends up being able to land ashore and make his way past the nearby French camp and begin scaling the cliffsides, but is spotted, he could easily lose a ton of men and prestige. It's the PoD I used for an unpublished TL I wrote sometime back.
~ Likewise, had Wolfe's ridiculous luck been replicated but Vaudreuil left
just one regiment near the Plains, the British defenders would likely have been temporarily driven back, giving crucial time for Montcalm to prepare for an offensive. In addition, had Montcalm simply been patient and waited for Bougainville's column to arrive, the whole British force might've been completely annhilated as they could've flanked them. With Quebec defended yet again and Wolfe and his men likely dead or captured, if things go
much worse for Frederick in Europe (who also enjoyed a lot of luck

) you might very well see the British sue for peace.
This is merely a successful "defense" of the French areas in North America. The French really did not have the capacity than do more than raid down the Hudson, and even then only maybe as far as Albany (and that'd be a wank). The English would never be "kicked" out of America barring huge, epic failure on the continent- something they just weren't set up to do there..
Honestly, the long-term effects are hard to project. In a "soft" French victory; a win in mainland Europe, loss in India, loss at sea (largely) but a victory in NA you might see a few minor land-swaps, but French-North America would remain intact. Perhaps the British abandon some claims on the Ohio River, but it would just mean the war is likely revisited in 10-15 years. It would definitely delay or at least change the ARW, if it was to even happen. A hard French peace, where the British suffer more losses everywhere probably likewise means a few land-swaps in favor of the French, perhaps a recognition of influence on the Carnatic Coast, recognition of French trade rights on the Ohio and a few islands repatriated to France.