Actually, what I was thinking was that America is pacified before there's even a question of French involvement, and so the French don't spend themselves deeper with assistance. Many of the rebels flee to amnesty in France, and the assistance of such gentlemen as Adams and Franklin allow the French to greatly ameliorate their financial difficulties. Instead of a French Revolution, we see a series of reforms which bring France towards a constitutional monarchy. From here, we see a swifter rise of capitalism in Europe, which means a swifter rise of Communism as a solution to its problems. Perhaps reactionary Germany, with its Kaiser, is the first to undergo a Communist Revolution, before the Great War; after the victory of the People's Republic of Germany and Austria (won simply by making a swift foray, establishing trenches on French land, and then allowing the French and British to take the offensive until they've ground themselves to a pulp), a war-exhausted England has its Communist Party fed enough arms and funds by the Germans to overthrow its own monarchs.
I'm sure there are a few problems here, such as how Germany beats an England that still has the Americas (perhaps Spain and Italy throw their lots in with it as well), but they can be worked out.