If the soundman has any MIDI capability, he could always mix the different Parts with that rather than having separate outputs...

While you can quite easily get away with the bass Part having no effects, putting all the drums out through one jack basically isn't really an option, as you can't apply any outboard reverb to say the snare and toms without it getting on the kick too (which you need pretty dry).

Thing is, whether the Parts are mixed in the box or out of the box, it is still simply mixing them... but inside the box, the options and capabilities are far higher. You still get full parametric EQ on each drum, reverb sends, even insert effects. And all under MIDI control. If you REALLY need a guy in FOH adjusting the Parts, just get him to use a MIDI fader bank and you are good to go. Separate outs won't really work unless you get say eight of them. No chance of that!

My G70 has a pair of AUX outs, but I've never had FOH need separate outs except when I'm doing LH bass, which can be dry, no problem. But drums, you need some ambiance at the very least...