Not really, taking some land for example requires you to sign a peace agreement, it's not just about occupying it like in the Civilization series.
Diplomacy is also not just about giving something in return for soemthing else, you have somewhat complex actions avaliable like guaranteeing and warning, different types of opinion between states that affect how they react to your actions and diplomatic proposals: Aggressive Expansion, Opinion, Trust, and Attitude in EU4 all of which serve a different purpose and it's not just a number that affects a party's disposition to another. A bunch of subject-overlord relationship types and interactions for each.