Prussia has been remarkably successful if it's been able to vassalize all those German states, including the catholic ones in the SW. Are some more in the way of allies?
Edit: ah, I had forgotten we had a Hohenzollern as Holy Roman Emperor. But the vassal nature of many states would be still a bit theoretical at this point?
Just out of curiosity, has Nader Shah been butterflied? Shortly after this OTL he took back *Azerbaijan for Persia.
Yeah the 'vassals' aspect is more for states outside of the HRE. Within, its loyal states, as well as those who side with the Hohenzollerns over the Hapsburgs. The issue is for when the aging Emperor Frederick dies, do they elect his son Frederick William, or do they elect Joseph, the recently returned son of Leopold, or possibly one of his sons. The Hohenzollerns have been centralizing the Empire, but at the same time, they are the only ones who have made true success against the seemingly unstoppable French, and the friends of the Emperor have of course gained a good deal of autonomy. Italy is mostly in the Hapsburg camp, both because Joseph has an appreciation for Italy, and because Emperor Frederick granted rights to Calvinists.
As for Nader Shah, he hasn't been totally butterflied, but he will lose the war, but only just, resulting in a status quo antebellum.