In regards to carrying 8 audio/iso tracks in your timeline… if you will be working with a post sound crew, they can “expand” to all the other ISO mics/tracks/channels based off one audio that you give us in the AAF/EDL provided that the metadata is maintained throughout the process. I’ve been involved with many workflows where the picture editor just carries the single “mix” channel (which could be channel 1 of 8) from the production mixer. This creates less clutter in the timeline and allows you to get your dialogue tracks under 4 audio tracks, which plays nicely with EDLs for the post sound department.
In Pro Tools, they call this the Field Recorder Workflow where we can take any single channel from an AAF and spill out the other recorded channels on our end.