Grouping instrument sections together

I really would like to have a way of grouping instrument sections together.
This would very much reduce some problems with creating and handling scores with a large number of instruments.

There are ways of reducing some of the issues by use of the Parts feature, but those methods, while better than nothing, don't really address some of the larger scale problems - simply pushing effort back to the end user. The whole point of software is to make the computer do the work, not the user.

Thus what I really want to see is a more hierarchical structure for instruments. Perhaps Dorico already has something like this -

For example: not sure if this "text diagram" will work here- [if it's not clear enough I'll do a graphic diagram - looks like the diagram will fall apart on most screens - so will redo shortly ....

Now done as a graphic ...]

This is a well known computer style tree structure, with possibly many levels.

The nodes of the tree would correspond both to staves in the score, and also to channel strips in the mixer.

Just as templates can be set up to enable easier construction of scores of different types, nodes could also have templates - which themselves could be adapted - either by removing instruments, or adding more.

Thus to set up an orchestra one could just define it as:

Orchestra = Woodwinds + Brass + Percussion + Strings + Other
where
Woodwinds = Flute+Oboe+ Clarinet+Bassoon
and Brass = Horn+Trumpet + Trombone
and Strings = Violins + Violas + Cellos
and Percussion = Timpani + Cymbals
and Other = Keyboards + Off-stage-band
Keyboards = Piano + Celesta

etc.

Visibility of staves in a score could be switched on or off for any node, while sound levels or muting or soloing could be set for each node in the mixer.

Also nodes in the mixer could be made visible or not, so if all the channels were to be seen, then all the nodes down to the bottom level would be displayed, but otherwise less information could be displayed - say just the overall levels and faders for the woodwind, brass etc.

This would seem to me to be far more flexible than trying to use parts and templates as they are currently available.

Features like this are available already in some DAWs - so it would seem to be feasible.