I tend to like what I see with digital technology. No, but it looks like a nice processor. I look forward to trying it and hearing what others have to say. Hard rock bands are redlining the transmitters, no outboard or beltpack limiting. I am sure they have 50 wedges on stage as well.
Most consoles now cue up in stereo.
Best method in a pinch is a switched mic on stage that is only in the monitor mixes. Other methods used are a momentary footswitch on stage in conjunction with that switched mic, ducked only in the house. The performer holds the switch down, the mic goes off in the house and that performer communicates with the band or engineer. The custom earpiece is still the way to go. I have been doing this a long time.