The only issue I have with the new MacBook Pro, from a personal perspective is the touch bar, it seems pretty useless. Mostly my problem is that I can't opt to not get the touch bar on larger models, so I have no means of indicating to Apple that I don't need it, or want it. Let's say it turns out the the touch bar is just a gimmick, and not of any actual use to anyone. Would Apple ever admit to that? I doubt it, so now we're stuck with it.
Also perhaps price. The MacBook Pro is somewhat overpriced.