The method of reordering DCA groups has potential for improvement, I would say... ;-) It works somehow, but to be honest: It is not far away from being unusable. I can imagine a workaround by adding standard DCA groups to a "zero out" scene, which you recall any time you start working on a new job. My "zero out" scene has several different settings than the factory "zero out" scene, which make my soundchecks faster. It should be possible to add basic DCA groups to the "zero out" scene like drums, keys, guitars, bass and vocals and leave the groups empty. The CS18AI makes it very easy to "fill" the DCA groups. Just press the "Groups" button, select a DCA group for editing and chose the channels you want to have in that particular group.
I'll check this tomorrow. It's getting late in Europe... ;-)