Fader Groups (Ch. View Sets) in Mackie HUI implementation?

I’ve been wondering which one of these devices offers the more complete integration with Nuendo: the Macke HUI or the Mackie Control?

The one major thing I see in Mackie Control that I don’t see in the Mackie HUI device is the “Fader Groups”, in Nuendo aka Mixer Channel View Sets. That’s a pretty major omission for a remote device.

Is there a reason why this can’t be assigned to a user button in the Mackie HUI implementation? At least as “Next Channel View Set”?