Having used Codan low rate radios, digital voice delivers a great capability in low snr scenarios. Unfortunately, from my experience, at snrs that deliver average 700d intelligibility, ssb does as well. Until such time that FreeDV exceeds ssb reliably, I don't see it as more than "yet another mode."
If it had SELCAL type features, that would be a bonus. Ring me when I receive a call. It might also be nice if it somehow interfaced with ion2g to deliver multiband ALE style connectivity. (This is just a dream.... I know the complexity.)
I have an SM1000 as well.... it leaves a LOT to be desired. My goal was to pair it with a field radio so that I didn't have to have a pc. Unfortunately, it is just so kludgy that it is easier to use a pc and then have the added capabilities of other non-voice modes.