Hi know this has been talked before, but this is a must have!
I did many tests on that and actually, the camera position is the same between SU and D5, but in two point perspective, all the changes done in SU (pan, zoom), are not reflected in D5.
It’ll be really necessary to have an exact replica in D5 of what’s in the SU viewport.
Since you introduce the concept of cameras in the latest D5 version, maybe you could add a small option in the SU plugin to “send” the SU viewport and its proportions to D5 under the form of a new camera, ready with the exact same aspect ratio.