Vocalign is a great tool for syncing adr:ed lines to production sound. So the content is kinda the same 
You can’t push it too far, that is obvious. But anyways this is why we may have to record many adr takes to get one that is already very close.
Why not just use vocalign then?
To me the workflow with Nuendo is just way too complicated… In PT it is very simple and easy…