When you read this article it gives you the feeling that this was a setback for Durham. However you might like to compare it with a much more detailed analysis by an Anon here.

Basically this order stops the bad actors in their tracks from trying to argue there was a Trump Server/Russia connection. If Sussman even DARE put his toe in that water the judge is saying that the prosecution can offer more on the data. Sussman is not going to be able to keep the lie going as a defense.

So in reality this is not so much a limitation on Durham as it is a limitation on Sussman. This is a good example of why we avoid fake news like plague. Even the framing of the subject can be turned on its head without any outright lying.

And yeah, Washington Examiner has been good sometimes, but it does not mean they are on the side of the truth.