More like how we assumed Liverpool would destroy PSG but the reverse happens to be the case. Although, I'm even surprised to see Dortmund qualified to this stage as their performance has been a wack this season. Barcelona remains the favourite both home and away but as you said, if Dortmund hasn't run out of luck, they probably might make things difficult for Barcelona.
PSG is a strong team and they have done better against English teams in recent years. About Dortmund, they got an easier opponent. Dortmund in 2023-24 season surprise everyone defeating PSG and reaching the finals of champions league but at that time they were a strong team on their local league. But this time their performance is weak and Barcelona ought to have an easy win against Dortmund. It should be an easy pass for Barcelona ahead. PSG too has an easy opponent ahead.