It might be too much feature creep and should be left out.
My understanding is that turbulence is basically the same as re-mapping the values of the voronoi map. But thinking about it I am not so sure if this is even true. Maybe turbulence is more like the possiblity to remap the input map values as opposed to just re-mapping it with a gradient.
Anyway, this is what I meant:
from black → white
to
black → white → black
Similar to what the color ramp does in the following image:
