The microtuning support in Vital is already quite amazing and well implemented.
That said, there’s a new standard that allows morphing between tunings and seems very promising for music making: ODDSound MTS-ESP
It claims that implementation isn’t too hard - there’s detail about how to add it to a synth in the “Client” section here: https://oddsound.com/devs.php
(also, Surge supports it so there’s a GPL implementation out there already)
I would love to see support for it in Vital at some point, although I know there are tons of other things on the list already.