Ok, so I brought this up on the Audiobus forum, but it seems it was quickly buried in that megathread.
I found a mention of the possible addition of microtuning (on the old forum - of which I wasn't a member, just scouring for info there).
Now, I'm fully aware that this is a relatively fringe request, as most users are satisfied with sticking to the equal tempered scale. But if you look at some of the the revered synths over the years, hardware and software (Yamaha, DSI, Korg, Roland, Waldorf, Access, Fairlight, E-mu, Ensoniq, Spectrasonics, Native Instruments, Uhe, Togu Audio, Madrona Labs, LinPlug, Celemony, Applied Acoustics, Audiothingies, BeepStreet, Xfer... the list goes on), they are all microtunable.
Consider that many of the heaviest hitters and pioneers of electronic music (Don Buchla, Richard D. James, Wendy Carlos, Terry Riley, to name just a few) have pushed for the integration of more flexible tuning systems in new technologies. And for good reason: There is so much that simply cannot be expressed without access to a wider spectrum of intervals.
Scala or TUN import in Obsidian would be a very welcome addition to this powerhouse of an instrument