Beyond issues under exclusive European legislation, the Commission has very little to say. A dead giveaway should be the fact that if Washington, Beijing or anybody else wants something from Europe, they don't ring up Ursula von der Leyen.
They ring up Emmanuel Macron, Olaf Scholz or Georgia Meloni.
The EU is de facto governed by all member state governments in their entirety.
And even now that qualified majority voting has mostly replaced unanimous voting, introducing for the first time the theoretical ability of the EU to actually force member states to do what they themselves do not want, there's very little in the way of actual consequences for now. As long as a country doesn't outright breach the European treaties (which they signed out of their own volition, I might add), nothing happens.
Case in point: Donald Tusk said that Poland would not implement the migration compromise. What's happened? Nothing's happened.
The "Brussels dictatorship" is a myth. Ironically, it's a myth not even invented by the likes of Nigel Farage, but by more moderate politicians who do support European unification but don't want to be associated with it. Parties left, right and centre vote yay in Brussels and cry nay at home. It's ridiculous. If you're a EU citizen and there's something you dislike about the EU, rest assured your national government agreed to it. Particularly if the offending feature was established prior to 2009, when every nation held a full veto over the most menial of things.
Claiming that the EU is a bigger threat to Poland than Russia is factually wrong, morally reprehensible and self-evidently absurd.
Poland is free to initiate Article 50 whenever it wants. There's no threat of invasion or violence, unlike what's coming from Russia.
Is there a threat of legal recourse if Warsaw violates the European Treaties? Sure. But complaining about that is like joining a football club and then crying bloody murder because no one will let you play tennis there.
