From my understanding, that lawsuit isn't necessarily about controlling prices independently anymore, but Valve's control of a game's price on other storefronts.Publisher / Developer set their own prices. Valve do show their own recommended prices for the relevant region/currency, but pub/dev can freely override.
Wolfire have a lawsuit on the way aleging that Valve does this via MFN in Steam, which is not the same as this story. A bunch of that case has been thrown out already including their lead argument to seperate Steam store and platform, so it will be interesting to see what evidence they can produce when overwhelmingly it seems prices are set independantly.
We'll see what evidence they bring, but if that is the case, then it needs to go.