I've been playing around with the mod and I've found very little use of the voice modulation implant, since it has such hard drawbacks for a job that's usually done by one person (trading and recruiting). My suggestion is to merge the two into a voice-modulator implant and have a gizmo in the pawn UI where you can select to have either of the two bonuses, or a normal voice, or to turn off the person's voice. Let me know what you think.