Is the touchbar useful? Is it good? Who cares, it is not getting used. Given Apple's butterfly keyboard issues using the laptop keyboard as your primary keyboard isn't really an option anyway. For the limited amount of time I use the laptop keyboard the touchbar certainly isn't worth it.
If Apple sold a decent external keyboard, not the fucking aluminum chiclet keyboard, with a touchbar I would certainly be willing to consider the touchbar on whatever merits it has, but as a tiny touch enabled 3rd screen above an infrequently used keyboard it is irrelevant. I, like many people, thought that the Optimus OLED keyboard with programmable dynamic keycaps was neat. I'd be willing to give a touchbar external keyboard a fair shake.