Remember everyone that DxO reviews are useless and biased towards Nikon.
So DxO saying the 24-70/2.8L II is great means nothing.
You are correct. "With a DxOMark score of 26"--and that is supposed to mean something?
However them saying that it's a great lens does not mean that it isn't (i.e. just because you're paranoid doesn't mean their not out to get you; a broken clock is still right twice a day; even a blind squirrel finds a nut every now and then, etc.)