I have a 3 gang switch box with 4 switches in it all running off the same
breaker. 2 - 3 ways and 1 double single pole. I want to take one three way
and the double single pole off the circuit that is on the original breaker
and put them on another breaker. Is it acceptable to just pull romex to the
box and only use the "Black" and the ground wire and leave the existing
neutrals all hooked together in the box, not using the neutral in the new
cable? They are all tied together now in the box. I know it would work, but
is it OK to do so? If not why?

Thanks,

LJ