He can reminisce fondly about those who have served a purpose in the short term ( Mohamed Sissoko , Peter Crouch , Craig Bellamy ) and those who came and went without making an impression ( Antonio Núñez , Jan Kromkamp , Mark González ) and even that he has an entirely different backroom staff now , but , for all that the pace of change has been dizzying at times , Liverpool look a force to be reckoned with in the league once more .