Finally all render/compositing jobs are done and I have now the full 1080p footage ready.
I still do have the intermediate multilayer renderpasses for each shot, in case there is the need to revisit some compositing tasks. The storage demand is quite huge for these (a single frame typically has ~140MB) , but it already saved me a lot of time and trouble. I guess I will only delete them once the movie is eventually released 🙂