Same here. Didn’t like the look and, come to think of it, the concept of adding that sub oscillator.
Having two layers is much more interesting.
As for the dots, Tristan from UVI explained @kvr: “Each color corresponds to category: Ambient, Bass, Bells, Brass, Chords, Flutes, Fretted, FX, Keyboards, Leads, Mallets, Organs, Pads, Pluck, Polysynth, Short, Strings, Sweeps, Vox”