At the Pink ULCC, it was not allowed to use manual thrust except in line training(left or right seat) whzn I was there. Many captains would refuse to fly a/thrst inop aircraft. And somehow PW1100 engine software were to slow to react during final so we would often use vpilot to adjust the speed margin for a/thrust.
I fly Leap engine now the difference is visibile even during cruise with soft cruise precision.