That's a shame then. I think the joystick thingie is rather gimmicky and inconvenient. I remember using a similar one on some gear (can't remember what): I had to wait patiently until I reached a proper level, or I would go too far and I'd need to go back, trying not to go too far in the other direction as well. Very cumbersome.
I see what you mean. The digital lever takes ~3.5 seconds to go from mute to full volume whereas an analog potentiometer can probably be adjust in a similar way for a fraction of the time.