I've yet to encounter a single good use for the touchbar, even the volume control is annoying to use. Especially since it's essentially impossible to hit without looking since there's no 'key feel', and I keep finding myself triggering touchbar actions because my fingers slightly overshoot the number or backspace key on occasion.
It'd be great as an optional addition above the F-keys, or even a little further away since it requires a concerted effort to use anyway.
Even the fact that the pretend 'escape' key doesn't properly operate all the way to the end of the bar (such that it might align with the keys below it) suggests it was far more about aesthetics or some weird notion of 'design' than actual usability.
Or I'm just not the right sort of Pro.
Yet there is still a solution which would probably satisfy most users: A traditional function key row and an additional Touch Bar above.