IOTL France was on the brink of total collapse by the allied forces. Then the anti-French Whigs were replaced by the anti-Habsburg Tories in the 1710 election. To the shock of their allies, they signed a separate, generous peace with the French. The Dutch and Habsburgs tried to continue the war but without British subsidies lost battle after battle. They eventually accepted the reality and agreed similar peace terms.
But what if some unrelated issue or scandal devastates the Tory campaign and the Whigs are returned to power, proceeding to complete French collapse. How bad can the peace terms get for Paris? What does this mean for future European alliances?