I find the Touch Bar frustrating. It's probably because of the way use my MacBook Pro on my lap a lot. I find that I often accidentally press buttons on the Touch Bar because my hands naturally rest in that area.
My real problem with that model is the sticky keyboard, though. My space bar and several other keys are intermittently unresponsive, which irritates me no end.
I've been on a touchbar mac and it's just as usable as having keys, with the added flexibility of changing them around (adding a lock button, etc.). It's mostly a non issue and does everything the prior bar did.
The notch essentially houses the 1 feature most people love on their X's, it becomes a non-issue once you use it. Or, if you're like me, you recognize that instead of losing a notch, you gained 2 ears of information.