Yeah. Breaking the blockade, let's recall, involves this:
Destroying their navy and a good chunk of their infrastructure, then placing them under dwarf guns until the canals exist. This is, let's be clear, complete naval subjugation. It's an existential threat to Marienburg just as much as the outright attempt to annex them would be.
For this reason, I favor [ ] They can make up for the loss in trade. No, it's not fair to the Karaz Ankor, but it lets us avoid a potentially very serious war and serves to bind the Empire more tightly to the Karaz Ankor, both of which are things we like.