Beyond the tone, I think my main issue with the Bran scenes as cool as they are, is that they are so pedestrian. We see a scene, then Bran shows up. In the books it kind of feels like a bit of a fever dream for him. Show context. For example in the Tower of Joy scene, why not show the Trident, with bodies everywhere? Why not a shot of Jamie stabbing the king? Robert sitting the throne? It needn't be much, just quick flashes as Bran gets to where he is going in the timeline. It would provide context, and could help set the tone before the scene.
The problem is, they missed half of what made the scene so haunting in the book. It wasn't about the swordfighting, it was about the mystery and the futility. Ned has to kill (or try) the brother of the supposed love of his life. The Kingsgaurd know that their war is over, and that because of their mission, they were unable to do anything about it, but they refuse to fail, even against poor odds. By this point in time they SHOULD be able to talk it out, but too much has happened. That is what the scene is missing.