Anything... a few examples:
- clip controls to the selected layer
- a shortcut to the advanced display options to enable os disable slices without actually going to advanced display e do that manually
- thumbnail horizontal list of clips in the selected deck
- or probably the most annoying thing of them all... a better way to display the deck list horizontally with full deck name length to avoid this:
..or none of the above and let the user customize what they want to see in the touch bar... in the mapping options you could have like:
"Edit Application Touch Bar"
or
"Edit Composition touch bar"