Why : In Kvatch Rebuilt, the Kvatch worldspace is not at the "right" place on the Tamriel map. (Entrance at 28, -4 instead of -36, -4.)
I was thinking I could export all the objects in the worldspace, edit the position with a python script and put them in a patch esp. I found a tool for Fallout 4 that genrate a Json file, but the tool doesn't have a complete list of data types.