If Jobs had been there, I can't help but believe there wouldn't have been a notch on the iPhone and the watch would have a longer lasting battery. My Samsung watch can go 2 days in between charges, so it should be possible.
Hard to say. Jobs oversaw all sorts of whiffs. The circular mouse comes to mind. And his ability to turn these kinds of errors into "it's good, actually" was so legendary that it had its own name.
https://en.wikipedia.org/wiki/Reality_distortion_field