I fully understand why the vertical summarizing view of the lanes exists: whatever is selected below will show in the main lane and is supposed to confirm your choices.
However, when there is a ton of other things that need to be looked at too, this visual redundancy can end up being horribly confusing.
In the preferences dialog box, could you please provide us with an option similar to the one that exists with the folder tracks: hide data when expanded, but with audio and MIDI tracks?
An option to
"Hide data on the principal top lane of a track WHEN Lanes are shown/expanded ?"
Please, this is so very important.