Sorry if I keep on talking about this, but it is a major flaw in the game in my opinion (which is still great, mind you). I think that it is extremely easy to keep Free Investiture.
The event is pretty much rare, and you can refuse him for just a minor malus in the relationship (-20), a small loss of piety (-25) and 2 % loss in religion's moral authority. With the right condition, you can even refuse him and gain a small amount of piety!
Come on, the relation hit should be much more severe, as the piety loss should. And where is the threat of excommunication? You'd just have to send your chancellor and your bishop to Rome and voilà, good relation with the pope once again!
That's hardly the way to represent the most important political conflict at a european level for almost three centuries.
The event is pretty much rare, and you can refuse him for just a minor malus in the relationship (-20), a small loss of piety (-25) and 2 % loss in religion's moral authority. With the right condition, you can even refuse him and gain a small amount of piety!
Come on, the relation hit should be much more severe, as the piety loss should. And where is the threat of excommunication? You'd just have to send your chancellor and your bishop to Rome and voilà, good relation with the pope once again!
That's hardly the way to represent the most important political conflict at a european level for almost three centuries.