read that paragraph taken from the PM article:
Unlike the control yokes of a Boeing jetliner, the side sticks on an Airbus are "asynchronous"—that is, they move independently. "If the person in the right seat is pulling back on the joystick, the person in the left seat doesn't feel it," says Dr. David Esser, a professor of aeronautical science at Embry-Riddle Aeronautical University. "Their stick doesn't move just because the other one does, unlike the old-fashioned mechanical systems like you find in small planes, where if you turn one, the [other] one turns the same way." Robert has no idea that, despite their conversation about descending, Bonin has continued to pull back on the side stick.
Maybe Bonin was so tense that he continuously pulled on the SS without realizing it, who knows, or he was just reacting wrongly. But the fact remains, that Robert did not realize it, at least for too long a time, because the ss is not visible to him and he was rightfully fixed on the PFD. With coupled controls it would have been more easily visible in front of him and furthermore
tangible.
Therefore my strong opinion that with coupled controls he would have intervened earlier.
This should be a strong point in favor of coupled controls =
feedback.