Alright interesting, and La Consolatrice Stuart?
if Philip does end up as King of Naples, would he be dictating his own marriage policy, or would that be the realm of Versailles?
If he's a prince du sang? Versailles. If he's king of Naples/Spain, probably the princesse des Ursins as OTL. Kill her off - or just never let her attach herself to the royal household to start with (she later ended up at the Jacobite court, so maybe she winds up there from the get-go rather than going for a Spanish holiday).
And what of La Consolatrice?