The motorized fader requires a special protocol (not MIDI), although it can be used as a standard fader, just with reduced MIDI resolution. Studio One doesn't support it, either.
What I am most concerned about at the moment, being new to SONAR, is whether or not it supports soft pickup (doesn't start acting on MIDI controls until the controller reaches the same value as the current state of the device parameter being controlled). That's my next thing to learn, challenge to overcome.
Re Tascam drivers...
They, like many (most?) others, outsourced their driver development. With the new line of audio interfaces, they've brought their driver development back in-house. I can't speak for other product lines, but my v1.00 US-16x08 driver works very well (significantly better than my PreSonus AudioBox 44VSL driver, which, on v1.3, still completed sucked). My iLok works. Finally. After wasting a year on a bad driver (of course, it took most of the year to identify the culprit). There are minor little issues with the v1.00 Tascam driver, but no showstoppers.
So, I'm thinking Tascam are going in the right direction, as is SONAR. And, yep, there's my Gibson SG bass, on its stand to my right. When spec'd or acquired, I had no idea all three where from the same big family.
How copacetic!