I think your opening misses out on the diplomacy in the game -- especially with Russia. Russia needs Sweden without a fight. Russia knows that Turkey is moving to the Black Sea. Russia is worried about Galicia. So Russia is going to approach Germany and Austria first to make sure he's not facing Anschluss.
If Russia is facing Anschluss, he's going to offer you an alliance post haste in exchange for Germany's good will and an undisputed Sweden. If not, he's going to be planning on how he can invade you. So he'll say something like, "How do you think we should handle Galicia?"
Now since you've already decided to leave it open because you're self-bouncing in Trieste, you're naturally going to say, "I'm good with a DMZ."
So now that Russia knows that Germany won't be pissed off if he invades you and that Galicia is open for the taking, he's going to approach Italy to try to convince him to open the Obriani attack. If Russia succeeds, then you're going to be facing a Russian army in Galicia, an Italian army in Tyrolia and Venice, and no guarantee that you're going to be able to get a neutral to start. Bad juju.
And if Russia fails, then you didn't need to open defensively against Italy to start.