Agreed, have been surprised at how little attention has been paid to this part of the update. The contours around my home area between Bristol and Bath are bang on.
Making a run along the central section of Hadrian’s Wall, I was really struck by the terrain there and also the the fact that the features of the wall system are clear in the ground. Just need Blackshark to refine the AI so that one section is not rendered as a very narrow terrace of houses!