I had a brain fart....................The arranger concept has become huge. From what I've read it seems like a big deal to implement under the hood. Another great request that has been made is nested folders. If nested folders became a reality and folders could be packed into parent folders similar to sub-directories, that might help with both requests:
create a mix with your usual tracks and folders (drums, guitar, vocals, etc.)
place all of the those folders into a new complete project folder
Slice and dice the project folder into useable sections ( Intro, verse, chorus, bridge, etc.)
drag the pieces around and save a mix scene
Rinse and repeat
Just thinking out loud.
Rocky