I disagree with you on this point. At the contrary invading another country becomes something impossible to me because, if I do not let one full stack per region and with extra huge religious troubles, I have one rebellion per region and it gets impossible to withstand such a trouble

.
Religious unrest combined to resistance to foreign occupation ruined so many of my campaigns that I would rather tend to increase the resistance to foreign occupation to make it longer and stronger, but, on the other hand, tone down the amount of rebellions.
I doubt the Ottoman Empire would have arrived to the gate of Vienna.. Or even survived if all regions Soliman conquered had rebelled
