I have seen this feature on the new synthesizer “Babylon” and was immediately convinced of this simple way to work with microtuning under Nuendo.
In movies it is often the case that microtuning can enhance special scenes by increasing the tension or even by giving acoustic hints of e.g. oriental influences or even science fiction.
In the linked short video on Youtube it is shown how easy it can be to use Microtuning intuitively with this system.
I’ve drawn a sketch of what it might look like in Nuendo.
Babylon Synthesizer Tutorial Short Video