Would be a lot worse if Dostal wasn't currently the best goalie in the NHL.
Not denying that but that's like saying Edmonton wouldn't be as good without McDavid. Of course the Ducks would be worse but every teams has players who are stars that carry the play. In goal is where it's working for the Ducks at the moment.
The issue I see is that teams are figuring out very quickly how to work around the Ducks. Most of it involves applying pressure and the players just don't seem confident to make the plays.
IMO, the Ducks need to trade for a true, top line, scoring winger but not a prospect. They need someone who can confidently make plays and lead on the ice as a forward.