When mixing musical theatre, I use a workflow that makes mixing live incredibly enjoyable to get a good sound but is an absolute pain to set up. These suggestions would help make this workflow significantly easier and even possible to do with scenes.
Have a group follow a DCA: Have a button that makes a group have the same channels as a selected DCA. This way, you can get the best of both worlds.
Have recallable “templates” for channels: Some actors may have drastically different singing/speaking voices, meaning that EQ may need to change, compressor, etc. It would be great to have a place to save these changes at the top and recall them with a button or inside a scene. This should also include sends/routing to effects, groups, etc.
I’m not trying to minimize the validity of your request with this next comment. Your request is certainly valid and worthy of A&H consideration….
That being said, you can accomplish the “group follow a DCA” functionality through the use of scenes and scene recall filters right now.
As far as having “recallable templates for channels” that already exists in the form of the Channel Library. If that functionality doesn’t offer all of the flexibility you are looking for, then you can always use the scene and recall filter method to “dial in” things exactly they way you want.
Obviously it would take some time/energy to program all of this out for a theater show, but that process is commonly done for these events.