Let's just say France will probably saying no dice at throwing the Stuarts out on their ear TTL
Likely remains in obscurityWithout the War of the Quadruple Alliance, what happens to Giulio Alberoni (Elizabeth Farnese's favorite and Spain's minister of state)?
Heh? The war was what made him fall from grace.Likely remains in obscurity
Ah then he'd like remain in power and focuses on Italy, until Louis I of Spain comes to the throneHeh? The war was what made him fall from grace.
Without the War of the Quadruple Alliance, what happens to Giulio Alberoni (Elizabeth Farnese's favorite and Spain's minister of state)?
On that note, what could greater French support achieve for the Jacobite cause
So a political coup rather than an uprising?
Why not let them simply survive the measles/pox? Everyone loves a good miracle survival - see Louis XV and Metz. And I think Louis XIV can soldier on until 1715 like OTL, his health was incredibly robust IIRC, so much so that it wasn't until he was half-eaten away with gangrene in 1715 that he finally died.
This is assuming that Adélaïde doesn't scheme to replace her dead sister with her BFF, Louisa Maria Stuart or anyone else for that matter. However, Alberoni could just as easily end up fetched up in Spain for whatever reason. Maybe the Princesse des Ursins stays in Madrid too? Or she could go to the Jacobite Court at St-Germain once Louisa gets there.