So i've been to war a couple time, one thing I feel a bit weird is how you automatically conquer a territory that was owned by your opponents. So let's say I want to go to his capital in order to make him my vassal. If the only way to go to that capital is to pass through 4-5 of his territories, and because I try to maximize my profit I was always at my maximum number of territories I now have 4-5 territories over the limits so I am now losing money.
I just find it weird that you're obliged to keep the territory, why can't I just sack it and let it burn to continue my crusade?