I have suggested something like this as a feature some time ago in the Nuendo 7 forums. Without any feedback. Such things also take a lot more time than one major version. I also asked this specific question to Timo, the Marketing & Business Development Manager of Steinberg. See here, 5th quote:
It’s not a lot to go by, very vague. But they are thinking about “something”. Seems to be a longer way off, though.