Personally, I do not see the point of setting up this function. Let me explain. In the context of playing with chords of two or three fingers, as on a paraphonic instrument, it is useful but not transendent...
If I now pluck a two-finger chord with my right hand, I affect 2 x 4, I don't release, and I play a lead with the less straight one. Damn, no more voices available, so I have to steal voices from a chord that is maintained. It's not nice...
So I could say, that I affect two voices or three voices, but always the same problem, if I hold the notes down.
So I'm really not convinced

Now to be able to say that for this sound, each note has to be played in 1,2,3 or 4 voices is interesting. I just simulated it with two to four identical layers. Ok for next version (2.0x). When you push Unisson, you can select full or 2,3,4 voices....