1. Have the IEM PAFL fader control the PAFL bus level if routed internally. At the moment it only controls the level if routed to an output port.
2. Have an software insert point on the PAFL bus.
I always setup an auto ducker on the PAFL bus, side chained from a mono mix of stage tech shout mics. I have to route the PAFL bus down an input channel to duck it which is always a little convoluted. A software insert straight on the PAFL bus would simplify things and be the very first board manufacturer to do so. Digico have an hardware insert on their solo buses but you can’t insert any software processing on it.