Same thing I tell everyone else. Don't fuking do that. You have to do it piecemeal, unless the provinces are crap(like the ones in arabia or africa) then you can just merc them all day. I like this new OE system. In curbs growth of players(AI seems to not worry to much about it), by causing rebellions, etc.
Yeah but I'm the freaking Timurids.
If I don't go to a long war, my shit get's wrecked with the "REBELLIONS FOR NO WAR". It's awful and will only stop if I can form the Mughal Empire.
Oh that needs fucking Dehli and Kashmir to be annexed and core.
All of that will take around 3-4 wars and then add the truce timers... You can see why it gets awful really quick. Kashmir itself takes around 40% over expansion. I wish it was like the EU3 system where you needed to vassalize them and then you can form the Mughal Empire.
But nope.
Oh and there's no way to deal with over expansion other than coring.
Badboy could have been dealt in a multitude of ways, you could hire an advisor that helped you reduced, you could build an embassy, some events reduced, your leaders stats reduced it, or you could just wait it out.
Compare that to what it is right now.