I don't know much about the French Revolution, but I have two ideas for PODs.
1.Britan intervenes in the Revoltion, invading and such. No idea beyond that.
2.The Frecnh Revolution is crushed, or never happens. After the Communist Manifesto is published, the peasants try again and create a Communist France. The French monarchy flees to either the New World or Luxembourg.
So, are these at all plausible or intersting?
1. There's no reason for the British to get involved in French affairs immediatly. They'd rather let the internal chaos grow and then strike - as per OTL.
2. This sounds ASBish to me. First, Marx has drawn a fair amount of inspiration in the Revolution (esp. the Jacobin dictatorship). Second, the Manifesto appealed mostly to the urban proletariate. Third, the uprising peasants would rather go for repartition of the lands (not their socialization) and abolition of duties and privilegies. And last, but not the least, why on earth should the royal house flee to New World (no French possessions, except Antilles and Guiana) or to Luxembourg (likely to be crushed in an upcoming war). Britain is more sound choice (proven IOTL by Charles X and Louis-Philippe
) if you want to be left alone, some German major (like Koblentz OTL) is suited better to prepare a retaliating strike.
As for more PODs, in my opinion, the period is crawling with them - dismission of Necker, dissent at the Estates-General, storming of the Bastille, march to Versailles, and so on, just name it.
My favourite one is about the coup of 18 Fructidor V . If there were no proofs of a Royalist plot, Barras would have remained in the moderate camp, and the counter-coup that paved the way to the 18 Brumaire would have been butterflied away. As a result, France would have some chances to become a 'normal' parliamentary Republic much earlier than IOTL.