The whole MS Office suite should support a customization of the touchbar, this would be great.
Peter Brendel commented
Formatting commands that are available in the ribbon, don't have to be repeated in the Touch-Bar. Or at least it should be able to be deselected in Preferences. This would allow the Text suggestions that are available in other Programs to also be possible in Outlook and Word.
Crome yellow commented
Add support to change TouchBar configurations in Microsoft Office.