On another note, part of why I love seeing opponents do things is because it makes the quest feel not just more alive but also more difficult.
I tend to go "yay, agency! And a great plot!" whenever we come across Lannister sabotage or Devil plots like in White Harbor and Gorgossos not just because it makes the world feel more alive, but also because it makes the quest feel like hard mode.
Feeling like an enemy could attack or something could go wrong and mess with our turn plan each month keeps some tension going in the quest, even if we ultimately defeat or overcome the threat (see the Wildfire attack for a good example of this).